openwrt-owl/package/kernel/mac80211/patches/300-pending_work.patch

--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -204,6 +204,8 @@ static void ieee80211_send_addba_resp(st
 		memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
 	else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
 		memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
+	else if (sdata->vif.type == NL80211_IFTYPE_WDS)
+		memcpy(mgmt->bssid, da, ETH_ALEN);
 
 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 					  IEEE80211_STYPE_ACTION);
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -81,7 +81,8 @@ static void ieee80211_send_addba_request
 	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 	if (sdata->vif.type == NL80211_IFTYPE_AP ||
 	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
-	    sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
+	    sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
+	    sdata->vif.type == NL80211_IFTYPE_WDS)
 		memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
 	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
 		memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
@@ -527,6 +528,7 @@ int ieee80211_start_tx_ba_session(struct
 	    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
 	    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 	    sdata->vif.type != NL80211_IFTYPE_AP &&
+	    sdata->vif.type != NL80211_IFTYPE_WDS &&
 	    sdata->vif.type != NL80211_IFTYPE_ADHOC)
 		return -EINVAL;
 
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -66,11 +66,11 @@ static ssize_t sta_flags_read(struct fil
 	test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
 
 	int res = scnprintf(buf, sizeof(buf),
-			    "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+			    "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
 			    TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
 			    TEST(PS_DRIVER), TEST(AUTHORIZED),
 			    TEST(SHORT_PREAMBLE),
-			    TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
+			    TEST(WME), TEST(CLEAR_PS_FILT),
 			    TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
 			    TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
 			    TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
@@ -455,6 +455,15 @@ void ieee80211_sta_debugfs_add(struct st
 	DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
 	DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
 
+	if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
+		debugfs_create_x32("driver_buffered_tids", 0400,
+				   sta->debugfs.dir,
+				   (u32 *)&sta->driver_buffered_tids);
+	else
+		debugfs_create_x64("driver_buffered_tids", 0400,
+				   sta->debugfs.dir,
+				   (u64 *)&sta->driver_buffered_tids);
+
 	drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 }
 
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -274,6 +274,12 @@ static int ieee80211_check_concurrent_if
 			if (iftype == NL80211_IFTYPE_ADHOC &&
 			    nsdata->vif.type == NL80211_IFTYPE_ADHOC)
 				return -EBUSY;
+			/*
+			 * will not add another interface while any channel
+			 * switch is active.
+			 */
+			if (nsdata->vif.csa_active)
+				return -EBUSY;
 
 			/*
 			 * The remaining checks are only performed for interfaces
@@ -463,7 +469,6 @@ int ieee80211_do_open(struct wireless_de
 	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 	struct net_device *dev = wdev->netdev;
 	struct ieee80211_local *local = sdata->local;
-	struct sta_info *sta;
 	u32 changed = 0;
 	int res;
 	u32 hw_reconf_flags = 0;
@@ -629,30 +634,8 @@ int ieee80211_do_open(struct wireless_de
 
 	set_bit(SDATA_STATE_RUNNING, &sdata->state);
 
-	if (sdata->vif.type == NL80211_IFTYPE_WDS) {
-		/* Create STA entry for the WDS peer */
-		sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
-				     GFP_KERNEL);
-		if (!sta) {
-			res = -ENOMEM;
-			goto err_del_interface;
-		}
-
-		sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
-		sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
-		sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
-
-		res = sta_info_insert(sta);
-		if (res) {
-			/* STA has been freed */
-			goto err_del_interface;
-		}
-
-		rate_control_rate_init(sta);
-		netif_carrier_on(dev);
-	} else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
+	if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
 		rcu_assign_pointer(local->p2p_sdata, sdata);
-	}
 
 	/*
 	 * set_multicast_list will be invoked by the networking core
@@ -809,6 +792,8 @@ static void ieee80211_do_stop(struct iee
 	cancel_work_sync(&local->dynamic_ps_enable_work);
 
 	cancel_work_sync(&sdata->recalc_smps);
+	sdata->vif.csa_active = false;
+	cancel_work_sync(&sdata->csa_finalize_work);
 
 	cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 
@@ -1116,6 +1101,74 @@ static void ieee80211_if_setup(struct ne
 	dev->destructor = free_netdev;
 }
 
+static void ieee80211_wds_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+					 struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_rx_status *rx_status;
+	struct ieee802_11_elems elems;
+	struct ieee80211_mgmt *mgmt;
+	struct sta_info *sta;
+	size_t baselen;
+	u32 rates = 0;
+	u16 stype;
+	bool new = false;
+	enum ieee80211_band band;
+	struct ieee80211_supported_band *sband;
+
+	rx_status = IEEE80211_SKB_RXCB(skb);
+	band = rx_status->band;
+	sband = local->hw.wiphy->bands[band];
+	mgmt = (struct ieee80211_mgmt *) skb->data;
+	stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
+
+	if (stype != IEEE80211_STYPE_BEACON)
+		return;
+
+	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
+	if (baselen > skb->len)
+		return;
+
+	ieee802_11_parse_elems(mgmt->u.probe_resp.variable,
+			       skb->len - baselen, false, &elems);
+
+	rates = ieee80211_sta_get_rates(local, &elems, band, NULL);
+
+	rcu_read_lock();
+
+	sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
+
+	if (!sta) {
+		rcu_read_unlock();
+		sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
+				     GFP_KERNEL);
+		if (!sta)
+			return;
+
+		new = true;
+	}
+
+	sta->last_rx = jiffies;
+	sta->sta.supp_rates[band] = rates;
+
+	if (elems.ht_cap_elem)
+		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
+				elems.ht_cap_elem, sta);
+
+	if (elems.wmm_param)
+		set_sta_flag(sta, WLAN_STA_WME);
+
+	if (new) {
+		sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+		sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+		sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+		rate_control_rate_init(sta);
+		sta_info_insert_rcu(sta);
+	}
+
+	rcu_read_unlock();
+}
+
 static void ieee80211_iface_work(struct work_struct *work)
 {
 	struct ieee80211_sub_if_data *sdata =
@@ -1220,6 +1273,9 @@ static void ieee80211_iface_work(struct 
 				break;
 			ieee80211_mesh_rx_queued_mgmt(sdata, skb);
 			break;
+		case NL80211_IFTYPE_WDS:
+			ieee80211_wds_rx_queued_mgmt(sdata, skb);
+			break;
 		default:
 			WARN(1, "frame for unexpected interface type");
 			break;
@@ -1282,6 +1338,7 @@ static void ieee80211_setup_sdata(struct
 	skb_queue_head_init(&sdata->skb_queue);
 	INIT_WORK(&sdata->work, ieee80211_iface_work);
 	INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
+	INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
 
 	switch (type) {
 	case NL80211_IFTYPE_P2P_GO:
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -365,6 +365,14 @@ minstrel_ht_update_stats(struct minstrel
 		}
 	}
 
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	/* use fixed index if set */
+	if (mp->fixed_rate_idx != -1) {
+		mi->max_tp_rate = mp->fixed_rate_idx;
+		mi->max_tp_rate2 = mp->fixed_rate_idx;
+		mi->max_prob_rate = mp->fixed_rate_idx;
+	}
+#endif
 
 	mi->stats_update = jiffies;
 }
@@ -774,6 +782,11 @@ minstrel_ht_get_rate(void *priv, struct 
 	info->flags |= mi->tx_flags;
 	minstrel_ht_check_cck_shortpreamble(mp, mi, txrc->short_preamble);
 
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	if (mp->fixed_rate_idx != -1)
+		return;
+#endif
+
 	/* Don't use EAPOL frames for sampling on non-mrr hw */
 	if (mp->hw->max_rates == 1 &&
 	    txrc->skb->protocol == cpu_to_be16(ETH_P_PAE))
@@ -781,16 +794,6 @@ minstrel_ht_get_rate(void *priv, struct 
 	else
 		sample_idx = minstrel_get_sample_rate(mp, mi);
 
-#ifdef CPTCFG_MAC80211_DEBUGFS
-	/* use fixed index if set */
-	if (mp->fixed_rate_idx != -1) {
-		mi->max_tp_rate = mp->fixed_rate_idx;
-		mi->max_tp_rate2 = mp->fixed_rate_idx;
-		mi->max_prob_rate = mp->fixed_rate_idx;
-		sample_idx = -1;
-	}
-#endif
-
 	mi->total_packets++;
 
 	/* wraparound */
@@ -804,10 +807,18 @@ minstrel_ht_get_rate(void *priv, struct 
 
 	sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES];
 	info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+	rate->count = 1;
+
+	if (sample_idx / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
+		int idx = sample_idx % ARRAY_SIZE(mp->cck_rates);
+		rate->idx = mp->cck_rates[idx];
+		rate->flags = 0;
+		return;
+	}
+
 	rate->idx = sample_idx % MCS_GROUP_RATES +
 		    (sample_group->streams - 1) * MCS_GROUP_RATES;
 	rate->flags = IEEE80211_TX_RC_MCS | sample_group->flags;
-	rate->count = 1;
 }
 
 static void
@@ -820,6 +831,9 @@ minstrel_ht_update_cck(struct minstrel_p
 	if (sband->band != IEEE80211_BAND_2GHZ)
 		return;
 
+	if (!(mp->hw->flags & IEEE80211_HW_SUPPORTS_HT_CCK_RATES))
+		return;
+
 	mi->cck_supported = 0;
 	mi->cck_supported_short = 0;
 	for (i = 0; i < 4; i++) {
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -936,8 +936,14 @@ ieee80211_rx_h_check(struct ieee80211_rx
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
 	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
 
-	/* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
-	if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
+	/*
+	 * Drop duplicate 802.11 retransmissions
+	 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
+	 */
+	if (rx->skb->len >= 24 && rx->sta &&
+	    !ieee80211_is_ctl(hdr->frame_control) &&
+	    !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
+	    !is_multicast_ether_addr(hdr->addr1)) {
 		if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
 			     rx->sta->last_seq_ctrl[rx->seqno_idx] ==
 			     hdr->seq_ctrl)) {
@@ -2369,6 +2375,7 @@ ieee80211_rx_h_action(struct ieee80211_r
 		    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
 		    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 		    sdata->vif.type != NL80211_IFTYPE_AP &&
+		    sdata->vif.type != NL80211_IFTYPE_WDS &&
 		    sdata->vif.type != NL80211_IFTYPE_ADHOC)
 			break;
 
@@ -2720,14 +2727,15 @@ ieee80211_rx_h_mgmt(struct ieee80211_rx_
 
 	if (!ieee80211_vif_is_mesh(&sdata->vif) &&
 	    sdata->vif.type != NL80211_IFTYPE_ADHOC &&
-	    sdata->vif.type != NL80211_IFTYPE_STATION)
+	    sdata->vif.type != NL80211_IFTYPE_STATION &&
+	    sdata->vif.type != NL80211_IFTYPE_WDS)
 		return RX_DROP_MONITOR;
 
 	switch (stype) {
 	case cpu_to_le16(IEEE80211_STYPE_AUTH):
 	case cpu_to_le16(IEEE80211_STYPE_BEACON):
 	case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
-		/* process for all: mesh, mlme, ibss */
+		/* process for all: mesh, mlme, ibss, wds */
 		break;
 	case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
 	case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
@@ -3059,10 +3067,16 @@ static int prepare_for_handlers(struct i
 		}
 		break;
 	case NL80211_IFTYPE_WDS:
-		if (bssid || !ieee80211_is_data(hdr->frame_control))
-			return 0;
 		if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2))
 			return 0;
+
+		if (ieee80211_is_data(hdr->frame_control) ||
+		    ieee80211_is_action(hdr->frame_control)) {
+			if (compare_ether_addr(sdata->vif.addr, hdr->addr1))
+				return 0;
+		} else if (!ieee80211_is_beacon(hdr->frame_control))
+			return 0;
+
 		break;
 	case NL80211_IFTYPE_P2P_DEVICE:
 		if (!ieee80211_is_public_action(hdr, skb->len) &&
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -32,7 +32,6 @@
  * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
  *	frames.
  * @WLAN_STA_WME: Station is a QoS-STA.
- * @WLAN_STA_WDS: Station is one of our WDS peers.
  * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
  *	IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
  *	frame to this station is transmitted.
@@ -66,7 +65,6 @@ enum ieee80211_sta_info_flags {
 	WLAN_STA_AUTHORIZED,
 	WLAN_STA_SHORT_PREAMBLE,
 	WLAN_STA_WME,
-	WLAN_STA_WDS,
 	WLAN_STA_CLEAR_PS_FILT,
 	WLAN_STA_MFP,
 	WLAN_STA_BLOCK_BA,
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -135,6 +135,9 @@ static struct ath_frame_info *get_frame_
 
 static void ath_send_bar(struct ath_atx_tid *tid, u16 seqno)
 {
+	if (!tid->an->sta)
+		return;
+
 	ieee80211_send_bar(tid->an->vif, tid->an->sta->addr, tid->tidno,
 			   seqno << IEEE80211_SEQ_SEQ_SHIFT);
 }
@@ -146,6 +149,93 @@ static void ath_set_rates(struct ieee802
 			       ARRAY_SIZE(bf->rates));
 }
 
+static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq,
+			     struct sk_buff *skb)
+{
+	int q;
+
+	q = skb_get_queue_mapping(skb);
+	if (txq == sc->tx.uapsdq)
+		txq = sc->tx.txq_map[q];
+
+	if (txq != sc->tx.txq_map[q])
+		return;
+
+	if (WARN_ON(--txq->pending_frames < 0))
+		txq->pending_frames = 0;
+
+	if (txq->stopped &&
+	    txq->pending_frames < sc->tx.txq_max_pending[q]) {
+		ieee80211_wake_queue(sc->hw, q);
+		txq->stopped = false;
+	}
+}
+
+static struct ath_atx_tid *
+ath_get_skb_tid(struct ath_softc *sc, struct ath_node *an, struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr;
+	u8 tidno = 0;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	if (ieee80211_is_data_qos(hdr->frame_control))
+		tidno = ieee80211_get_qos_ctl(hdr)[0];
+
+	tidno &= IEEE80211_QOS_CTL_TID_MASK;
+	return ATH_AN_2_TID(an, tidno);
+}
+
+static bool ath_tid_has_buffered(struct ath_atx_tid *tid)
+{
+	return !skb_queue_empty(&tid->buf_q) || !skb_queue_empty(&tid->retry_q);
+}
+
+static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid)
+{
+	struct sk_buff *skb;
+
+	skb = __skb_dequeue(&tid->retry_q);
+	if (!skb)
+		skb = __skb_dequeue(&tid->buf_q);
+
+	return skb;
+}
+
+/*
+ * ath_tx_tid_change_state:
+ * - clears a-mpdu flag of previous session
+ * - force sequence number allocation to fix next BlockAck Window
+ */
+static void
+ath_tx_tid_change_state(struct ath_softc *sc, struct ath_atx_tid *tid)
+{
+	struct ath_txq *txq = tid->ac->txq;
+	struct ieee80211_tx_info *tx_info;
+	struct sk_buff *skb, *tskb;
+	struct ath_buf *bf;
+	struct ath_frame_info *fi;
+
+	skb_queue_walk_safe(&tid->buf_q, skb, tskb) {
+		fi = get_frame_info(skb);
+		bf = fi->bf;
+
+		tx_info = IEEE80211_SKB_CB(skb);
+		tx_info->flags &= ~IEEE80211_TX_CTL_AMPDU;
+
+		if (bf)
+			continue;
+
+		bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+		if (!bf) {
+			__skb_unlink(skb, &tid->buf_q);
+			ath_txq_skb_done(sc, txq, skb);
+			ieee80211_free_txskb(sc->hw, skb);
+			continue;
+		}
+	}
+
+}
+
 static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 {
 	struct ath_txq *txq = tid->ac->txq;
@@ -160,27 +250,22 @@ static void ath_tx_flush_tid(struct ath_
 
 	memset(&ts, 0, sizeof(ts));
 
-	while ((skb = __skb_dequeue(&tid->buf_q))) {
+	while ((skb = __skb_dequeue(&tid->retry_q))) {
 		fi = get_frame_info(skb);
 		bf = fi->bf;
-
 		if (!bf) {
-			bf = ath_tx_setup_buffer(sc, txq, tid, skb);
-			if (!bf) {
-				ieee80211_free_txskb(sc->hw, skb);
-				continue;
-			}
+			ath_txq_skb_done(sc, txq, skb);
+			ieee80211_free_txskb(sc->hw, skb);
+			continue;
 		}
 
-		if (fi->retries) {
-			list_add_tail(&bf->list, &bf_head);
+		if (fi->baw_tracked) {
 			ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
-			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 			sendbar = true;
-		} else {
-			ath_set_rates(tid->an->vif, tid->an->sta, bf);
-			ath_tx_send_normal(sc, txq, NULL, skb);
 		}
+
+		list_add_tail(&bf->list, &bf_head);
+		ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 	}
 
 	if (sendbar) {
@@ -209,13 +294,16 @@ static void ath_tx_update_baw(struct ath
 }
 
 static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
-			     u16 seqno)
+			     struct ath_buf *bf)
 {
+	struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu);
+	u16 seqno = bf->bf_state.seqno;
 	int index, cindex;
 
 	index  = ATH_BA_INDEX(tid->seq_start, seqno);
 	cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
 	__set_bit(cindex, tid->tx_buf);
+	fi->baw_tracked = 1;
 
 	if (index >= ((tid->baw_tail - tid->baw_head) &
 		(ATH_TID_MAX_BUFS - 1))) {
@@ -224,12 +312,6 @@ static void ath_tx_addto_baw(struct ath_
 	}
 }
 
-/*
- * TODO: For frame(s) that are in the retry state, we will reuse the
- * sequence number(s) without setting the retry bit. The
- * alternative is to give up on these and BAR the receiver's window
- * forward.
- */
 static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
 			  struct ath_atx_tid *tid)
 
@@ -243,7 +325,7 @@ static void ath_tid_drain(struct ath_sof
 	memset(&ts, 0, sizeof(ts));
 	INIT_LIST_HEAD(&bf_head);
 
-	while ((skb = __skb_dequeue(&tid->buf_q))) {
+	while ((skb = ath_tid_dequeue(tid))) {
 		fi = get_frame_info(skb);
 		bf = fi->bf;
 
@@ -253,14 +335,8 @@ static void ath_tid_drain(struct ath_sof
 		}
 
 		list_add_tail(&bf->list, &bf_head);
-
-		ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
 		ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 	}
-
-	tid->seq_next = tid->seq_start;
-	tid->baw_tail = tid->baw_head;
-	tid->bar_index = -1;
 }
 
 static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq,
@@ -380,7 +456,6 @@ static void ath_tx_complete_aggr(struct 
 	struct ieee80211_tx_rate rates[4];
 	struct ath_frame_info *fi;
 	int nframes;
-	u8 tidno;
 	bool flush = !!(ts->ts_status & ATH9K_TX_FLUSH);
 	int i, retries;
 	int bar_index = -1;
@@ -406,7 +481,7 @@ static void ath_tx_complete_aggr(struct 
 		while (bf) {
 			bf_next = bf->bf_next;
 
-			if (!bf->bf_stale || bf_next != NULL)
+			if (!bf->bf_state.stale || bf_next != NULL)
 				list_move_tail(&bf->list, &bf_head);
 
 			ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0);
@@ -417,8 +492,7 @@ static void ath_tx_complete_aggr(struct 
 	}
 
 	an = (struct ath_node *)sta->drv_priv;
-	tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK;
-	tid = ATH_AN_2_TID(an, tidno);
+	tid = ath_get_skb_tid(sc, an, skb);
 	seq_first = tid->seq_start;
 	isba = ts->ts_flags & ATH9K_TX_BA;
 
@@ -430,7 +504,7 @@ static void ath_tx_complete_aggr(struct 
 	 * Only BlockAcks have a TID and therefore normal Acks cannot be
 	 * checked
 	 */
-	if (isba && tidno != ts->tid)
+	if (isba && tid->tidno != ts->tid)
 		txok = false;
 
 	isaggr = bf_isaggr(bf);
@@ -466,7 +540,8 @@ static void ath_tx_complete_aggr(struct 
 		tx_info = IEEE80211_SKB_CB(skb);
 		fi = get_frame_info(skb);
 
-		if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) {
+		if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno) ||
+		    !tid->active) {
 			/*
 			 * Outside of the current BlockAck window,
 			 * maybe part of a previous session
@@ -499,7 +574,7 @@ static void ath_tx_complete_aggr(struct 
 		 * not a holding desc.
 		 */
 		INIT_LIST_HEAD(&bf_head);
-		if (bf_next != NULL || !bf_last->bf_stale)
+		if (bf_next != NULL || !bf_last->bf_state.stale)
 			list_move_tail(&bf->list, &bf_head);
 
 		if (!txpending) {
@@ -523,7 +598,7 @@ static void ath_tx_complete_aggr(struct 
 				ieee80211_sta_eosp(sta);
 			}
 			/* retry the un-acked ones */
-			if (bf->bf_next == NULL && bf_last->bf_stale) {
+			if (bf->bf_next == NULL && bf_last->bf_state.stale) {
 				struct ath_buf *tbf;
 
 				tbf = ath_clone_txbuf(sc, bf_last);
@@ -560,7 +635,7 @@ static void ath_tx_complete_aggr(struct 
 		if (an->sleeping)
 			ieee80211_sta_set_buffered(sta, tid->tidno, true);
 
-		skb_queue_splice(&bf_pending, &tid->buf_q);
+		skb_queue_splice_tail(&bf_pending, &tid->retry_q);
 		if (!an->sleeping) {
 			ath_tx_queue_tid(txq, tid);
 
@@ -618,7 +693,7 @@ static void ath_tx_process_buffer(struct
 	} else
 		ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok);
 
-	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) && !flush)
+	if (!flush)
 		ath_txq_schedule(sc, txq);
 }
 
@@ -792,15 +867,20 @@ static int ath_compute_num_delims(struct
 
 static struct ath_buf *
 ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq,
-			struct ath_atx_tid *tid)
+			struct ath_atx_tid *tid, struct sk_buff_head **q)
 {
+	struct ieee80211_tx_info *tx_info;
 	struct ath_frame_info *fi;
 	struct sk_buff *skb;
 	struct ath_buf *bf;
 	u16 seqno;
 
 	while (1) {
-		skb = skb_peek(&tid->buf_q);
+		*q = &tid->retry_q;
+		if (skb_queue_empty(*q))
+			*q = &tid->buf_q;
+
+		skb = skb_peek(*q);
 		if (!skb)
 			break;
 
@@ -808,13 +888,26 @@ ath_tx_get_tid_subframe(struct ath_softc
 		bf = fi->bf;
 		if (!fi->bf)
 			bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+		else
+			bf->bf_state.stale = false;
 
 		if (!bf) {
-			__skb_unlink(skb, &tid->buf_q);
+			__skb_unlink(skb, *q);
+			ath_txq_skb_done(sc, txq, skb);
 			ieee80211_free_txskb(sc->hw, skb);
 			continue;
 		}
 
+		bf->bf_next = NULL;
+		bf->bf_lastbf = bf;
+
+		tx_info = IEEE80211_SKB_CB(skb);
+		tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT;
+		if (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) {
+			bf->bf_state.bf_type = 0;
+			return bf;
+		}
+
 		bf->bf_state.bf_type = BUF_AMPDU | BUF_AGGR;
 		seqno = bf->bf_state.seqno;
 
@@ -828,73 +921,52 @@ ath_tx_get_tid_subframe(struct ath_softc
 
 			INIT_LIST_HEAD(&bf_head);
 			list_add(&bf->list, &bf_head);
-			__skb_unlink(skb, &tid->buf_q);
+			__skb_unlink(skb, *q);
 			ath_tx_update_baw(sc, tid, seqno);
 			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 			continue;
 		}
 
-		bf->bf_next = NULL;
-		bf->bf_lastbf = bf;
 		return bf;
 	}
 
 	return NULL;
 }
 
-static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
-					     struct ath_txq *txq,
-					     struct ath_atx_tid *tid,
-					     struct list_head *bf_q,
-					     int *aggr_len)
+static bool
+ath_tx_form_aggr(struct ath_softc *sc, struct ath_txq *txq,
+		 struct ath_atx_tid *tid, struct list_head *bf_q,
+		 struct ath_buf *bf_first, struct sk_buff_head *tid_q,
+		 int *aggr_len)
 {
 #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
-	struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL;
-	int rl = 0, nframes = 0, ndelim, prev_al = 0;
+	struct ath_buf *bf = bf_first, *bf_prev = NULL;
+	int nframes = 0, ndelim;
 	u16 aggr_limit = 0, al = 0, bpad = 0,
-		al_delta, h_baw = tid->baw_size / 2;
-	enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
+	    al_delta, h_baw = tid->baw_size / 2;
 	struct ieee80211_tx_info *tx_info;
 	struct ath_frame_info *fi;
 	struct sk_buff *skb;
+	bool closed = false;
 
-	do {
-		bf = ath_tx_get_tid_subframe(sc, txq, tid);
-		if (!bf) {
-			status = ATH_AGGR_BAW_CLOSED;
-			break;
-		}
+	bf = bf_first;
+	aggr_limit = ath_lookup_rate(sc, bf, tid);
 
+	do {
 		skb = bf->bf_mpdu;
 		fi = get_frame_info(skb);
 
-		if (!bf_first)
-			bf_first = bf;
-
-		if (!rl) {
-			ath_set_rates(tid->an->vif, tid->an->sta, bf);
-			aggr_limit = ath_lookup_rate(sc, bf, tid);
-			rl = 1;
-		}
-
 		/* do not exceed aggregation limit */
 		al_delta = ATH_AGGR_DELIM_SZ + fi->framelen;
+		if (nframes) {
+			if (aggr_limit < al + bpad + al_delta ||
+			    ath_lookup_legacy(bf) || nframes >= h_baw)
+				break;
 
-		if (nframes &&
-		    ((aggr_limit < (al + bpad + al_delta + prev_al)) ||
-		     ath_lookup_legacy(bf))) {
-			status = ATH_AGGR_LIMITED;
-			break;
-		}
-
-		tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
-		if (nframes && (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
-			break;
-
-		/* do not exceed subframe limit */
-		if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) {
-			status = ATH_AGGR_LIMITED;
-			break;
+			tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+			if ((tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ||
+			    !(tx_info->flags & IEEE80211_TX_CTL_AMPDU))
+				break;
 		}
 
 		/* add padding for previous frame to aggregation length */
@@ -912,22 +984,37 @@ static enum ATH_AGGR_STATUS ath_tx_form_
 		bf->bf_next = NULL;
 
 		/* link buffers of this frame to the aggregate */
-		if (!fi->retries)
-			ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
+		if (!fi->baw_tracked)
+			ath_tx_addto_baw(sc, tid, bf);
 		bf->bf_state.ndelim = ndelim;
 
-		__skb_unlink(skb, &tid->buf_q);
+		__skb_unlink(skb, tid_q);
 		list_add_tail(&bf->list, bf_q);
 		if (bf_prev)
 			bf_prev->bf_next = bf;
 
 		bf_prev = bf;
 
-	} while (!skb_queue_empty(&tid->buf_q));
+		bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
+		if (!bf) {
+			closed = true;
+			break;
+		}
+	} while (ath_tid_has_buffered(tid));
+
+	bf = bf_first;
+	bf->bf_lastbf = bf_prev;
+
+	if (bf == bf_prev) {
+		al = get_frame_info(bf->bf_mpdu)->framelen;
+		bf->bf_state.bf_type = BUF_AMPDU;
+	} else {
+		TX_STAT_INC(txq->axq_qnum, a_aggr);
+	}
 
 	*aggr_len = al;
 
-	return status;
+	return closed;
 #undef PADBYTES
 }
 
@@ -999,7 +1086,7 @@ void ath_update_max_aggr_framelen(struct
 }
 
 static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf,
-			     struct ath_tx_info *info, int len)
+			     struct ath_tx_info *info, int len, bool rts)
 {
 	struct ath_hw *ah = sc->sc_ah;
 	struct sk_buff *skb;
@@ -1008,6 +1095,7 @@ static void ath_buf_set_rate(struct ath_
 	const struct ieee80211_rate *rate;
 	struct ieee80211_hdr *hdr;
 	struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu);
+	u32 rts_thresh = sc->hw->wiphy->rts_threshold;
 	int i;
 	u8 rix = 0;
 
@@ -1030,7 +1118,17 @@ static void ath_buf_set_rate(struct ath_
 		rix = rates[i].idx;
 		info->rates[i].Tries = rates[i].count;
 
-		    if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
+		/*
+		 * Handle RTS threshold for unaggregated HT frames.
+		 */
+		if (bf_isampdu(bf) && !bf_isaggr(bf) &&
+		    (rates[i].flags & IEEE80211_TX_RC_MCS) &&
+		    unlikely(rts_thresh != (u32) -1)) {
+			if (!rts_thresh || (len > rts_thresh))
+				rts = true;
+		}
+
+		if (rts || rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 			info->rates[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
 			info->flags |= ATH9K_TXDESC_RTSENA;
 		} else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
@@ -1123,6 +1221,8 @@ static void ath_tx_fill_desc(struct ath_
 	struct ath_hw *ah = sc->sc_ah;
 	struct ath_buf *bf_first = NULL;
 	struct ath_tx_info info;
+	u32 rts_thresh = sc->hw->wiphy->rts_threshold;
+	bool rts = false;
 
 	memset(&info, 0, sizeof(info));
 	info.is_first = true;
@@ -1159,7 +1259,22 @@ static void ath_tx_fill_desc(struct ath_
 				info.flags |= (u32) bf->bf_state.bfs_paprd <<
 					      ATH9K_TXDESC_PAPRD_S;
 
-			ath_buf_set_rate(sc, bf, &info, len);
+			/*
+			 * mac80211 doesn't handle RTS threshold for HT because
+			 * the decision has to be taken based on AMPDU length
+			 * and aggregation is done entirely inside ath9k.
+			 * Set the RTS/CTS flag for the first subframe based
+			 * on the threshold.
+			 */
+			if (aggr && (bf == bf_first) &&
+			    unlikely(rts_thresh != (u32) -1)) {
+				/*
+				 * "len" is the size of the entire AMPDU.
+				 */
+				if (!rts_thresh || (len > rts_thresh))
+					rts = true;
+			}
+			ath_buf_set_rate(sc, bf, &info, len, rts);
 		}
 
 		info.buf_addr[0] = bf->bf_buf_addr;
@@ -1188,53 +1303,86 @@ static void ath_tx_fill_desc(struct ath_
 	}
 }
 
-static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
-			      struct ath_atx_tid *tid)
+static void
+ath_tx_form_burst(struct ath_softc *sc, struct ath_txq *txq,
+		  struct ath_atx_tid *tid, struct list_head *bf_q,
+		  struct ath_buf *bf_first, struct sk_buff_head *tid_q)
 {
-	struct ath_buf *bf;
-	enum ATH_AGGR_STATUS status;
-	struct ieee80211_tx_info *tx_info;
-	struct list_head bf_q;
-	int aggr_len;
+	struct ath_buf *bf = bf_first, *bf_prev = NULL;
+	struct sk_buff *skb;
+	int nframes = 0;
 
 	do {
-		if (skb_queue_empty(&tid->buf_q))
-			return;
+		struct ieee80211_tx_info *tx_info;
+		skb = bf->bf_mpdu;
 
-		INIT_LIST_HEAD(&bf_q);
+		nframes++;
+		__skb_unlink(skb, tid_q);
+		list_add_tail(&bf->list, bf_q);
+		if (bf_prev)
+			bf_prev->bf_next = bf;
+		bf_prev = bf;
 
-		status = ath_tx_form_aggr(sc, txq, tid, &bf_q, &aggr_len);
+		if (nframes >= 2)
+			break;
 
-		/*
-		 * no frames picked up to be aggregated;
-		 * block-ack window is not open.
-		 */
-		if (list_empty(&bf_q))
+		bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
+		if (!bf)
 			break;
 
-		bf = list_first_entry(&bf_q, struct ath_buf, list);
-		bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list);
 		tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+		if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
+			break;
 
-		if (tid->ac->clear_ps_filter) {
-			tid->ac->clear_ps_filter = false;
-			tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
-		} else {
-			tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT;
-		}
+		ath_set_rates(tid->an->vif, tid->an->sta, bf);
+	} while (1);
+}
 
-		/* if only one frame, send as non-aggregate */
-		if (bf == bf->bf_lastbf) {
-			aggr_len = get_frame_info(bf->bf_mpdu)->framelen;
-			bf->bf_state.bf_type = BUF_AMPDU;
-		} else {
-			TX_STAT_INC(txq->axq_qnum, a_aggr);
-		}
+static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
+			      struct ath_atx_tid *tid, bool *stop)
+{
+	struct ath_buf *bf;
+	struct ieee80211_tx_info *tx_info;
+	struct sk_buff_head *tid_q;
+	struct list_head bf_q;
+	int aggr_len = 0;
+	bool aggr, last = true;
+
+	if (!ath_tid_has_buffered(tid))
+		return false;
+
+	INIT_LIST_HEAD(&bf_q);
+
+	bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
+	if (!bf)
+		return false;
+
+	tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+	aggr = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
+	if ((aggr && txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) ||
+		(!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH)) {
+		*stop = true;
+		return false;
+	}
 
-		ath_tx_fill_desc(sc, bf, txq, aggr_len);
-		ath_tx_txqaddbuf(sc, txq, &bf_q, false);
-	} while (txq->axq_ampdu_depth < ATH_AGGR_MIN_QDEPTH &&
-		 status != ATH_AGGR_BAW_CLOSED);
+	ath_set_rates(tid->an->vif, tid->an->sta, bf);
+	if (aggr)
+		last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf,
+					tid_q, &aggr_len);
+	else
+		ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q);
+
+	if (list_empty(&bf_q))
+		return false;
+
+	if (tid->ac->clear_ps_filter || tid->an->no_ps_filter) {
+		tid->ac->clear_ps_filter = false;
+		tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+	}
+
+	ath_tx_fill_desc(sc, bf, txq, aggr_len);
+	ath_tx_txqaddbuf(sc, txq, &bf_q, false);
+	return true;
 }
 
 int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
@@ -1258,6 +1406,9 @@ int ath_tx_aggr_start(struct ath_softc *
 		an->mpdudensity = density;
 	}
 
+	/* force sequence number allocation for pending frames */
+	ath_tx_tid_change_state(sc, txtid);
+
 	txtid->active = true;
 	txtid->paused = true;
 	*ssn = txtid->seq_start = txtid->seq_next;
@@ -1277,8 +1428,9 @@ void ath_tx_aggr_stop(struct ath_softc *
 
 	ath_txq_lock(sc, txq);
 	txtid->active = false;
-	txtid->paused = true;
+	txtid->paused = false;
 	ath_tx_flush_tid(sc, txtid);
+	ath_tx_tid_change_state(sc, txtid);
 	ath_txq_unlock_complete(sc, txq);
 }
 
@@ -1302,7 +1454,7 @@ void ath_tx_aggr_sleep(struct ieee80211_
 
 		ath_txq_lock(sc, txq);
 
-		buffered = !skb_queue_empty(&tid->buf_q);
+		buffered = ath_tid_has_buffered(tid);
 
 		tid->sched = false;
 		list_del(&tid->list);
@@ -1334,7 +1486,7 @@ void ath_tx_aggr_wakeup(struct ath_softc
 		ath_txq_lock(sc, txq);
 		ac->clear_ps_filter = true;
 
-		if (!skb_queue_empty(&tid->buf_q) && !tid->paused) {
+		if (!tid->paused && ath_tid_has_buffered(tid)) {
 			ath_tx_queue_tid(txq, tid);
 			ath_txq_schedule(sc, txq);
 		}
@@ -1359,7 +1511,7 @@ void ath_tx_aggr_resume(struct ath_softc
 	tid->baw_size = IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor;
 	tid->paused = false;
 
-	if (!skb_queue_empty(&tid->buf_q)) {
+	if (ath_tid_has_buffered(tid)) {
 		ath_tx_queue_tid(txq, tid);
 		ath_txq_schedule(sc, txq);
 	}
@@ -1379,6 +1531,7 @@ void ath9k_release_buffered_frames(struc
 	struct ieee80211_tx_info *info;
 	struct list_head bf_q;
 	struct ath_buf *bf_tail = NULL, *bf;
+	struct sk_buff_head *tid_q;
 	int sent = 0;
 	int i;
 
@@ -1394,15 +1547,15 @@ void ath9k_release_buffered_frames(struc
 			continue;
 
 		ath_txq_lock(sc, tid->ac->txq);
-		while (!skb_queue_empty(&tid->buf_q) && nframes > 0) {
-			bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid);
+		while (nframes > 0) {
+			bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid, &tid_q);
 			if (!bf)
 				break;
 
-			__skb_unlink(bf->bf_mpdu, &tid->buf_q);
+			__skb_unlink(bf->bf_mpdu, tid_q);
 			list_add_tail(&bf->list, &bf_q);
 			ath_set_rates(tid->an->vif, tid->an->sta, bf);
-			ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
+			ath_tx_addto_baw(sc, tid, bf);
 			bf->bf_state.bf_type &= ~BUF_AGGR;
 			if (bf_tail)
 				bf_tail->bf_next = bf;
@@ -1412,7 +1565,7 @@ void ath9k_release_buffered_frames(struc
 			sent++;
 			TX_STAT_INC(txq->axq_qnum, a_queued_hw);
 
-			if (skb_queue_empty(&tid->buf_q))
+			if (an->sta && !ath_tid_has_buffered(tid))
 				ieee80211_sta_set_buffered(an->sta, i, false);
 		}
 		ath_txq_unlock_complete(sc, tid->ac->txq);
@@ -1571,7 +1724,7 @@ static void ath_drain_txq_list(struct at
 	while (!list_empty(list)) {
 		bf = list_first_entry(list, struct ath_buf, list);
 
-		if (bf->bf_stale) {
+		if (bf->bf_state.stale) {
 			list_del(&bf->list);
 
 			ath_tx_return_buffer(sc, bf);
@@ -1665,25 +1818,27 @@ void ath_tx_cleanupq(struct ath_softc *s
  */
 void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
 {
-	struct ath_atx_ac *ac, *ac_tmp, *last_ac;
+	struct ath_atx_ac *ac, *last_ac;
 	struct ath_atx_tid *tid, *last_tid;
+	bool sent = false;
 
 	if (test_bit(SC_OP_HW_RESET, &sc->sc_flags) ||
-	    list_empty(&txq->axq_acq) ||
-	    txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
+	    list_empty(&txq->axq_acq))
 		return;
 
 	rcu_read_lock();
 
-	ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);
 	last_ac = list_entry(txq->axq_acq.prev, struct ath_atx_ac, list);
+	while (!list_empty(&txq->axq_acq)) {
+		bool stop = false;
 
-	list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) {
+		ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);
 		last_tid = list_entry(ac->tid_q.prev, struct ath_atx_tid, list);
 		list_del(&ac->list);
 		ac->sched = false;
 
 		while (!list_empty(&ac->tid_q)) {
+
 			tid = list_first_entry(&ac->tid_q, struct ath_atx_tid,
 					       list);
 			list_del(&tid->list);
@@ -1692,17 +1847,17 @@ void ath_txq_schedule(struct ath_softc *
 			if (tid->paused)
 				continue;
 
-			ath_tx_sched_aggr(sc, txq, tid);
+			if (ath_tx_sched_aggr(sc, txq, tid, &stop))
+				sent = true;
 
 			/*
 			 * add tid to round-robin queue if more frames
 			 * are pending for the tid
 			 */
-			if (!skb_queue_empty(&tid->buf_q))
+			if (ath_tid_has_buffered(tid))
 				ath_tx_queue_tid(txq, tid);
 
-			if (tid == last_tid ||
-			    txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
+			if (stop || tid == last_tid)
 				break;
 		}
 
@@ -1711,9 +1866,17 @@ void ath_txq_schedule(struct ath_softc *
 			list_add_tail(&ac->list, &txq->axq_acq);
 		}
 
-		if (ac == last_ac ||
-		    txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
+		if (stop)
 			break;
+
+		if (ac == last_ac) {
+			if (!sent)
+				break;
+
+			sent = false;
+			last_ac = list_entry(txq->axq_acq.prev,
+					     struct ath_atx_ac, list);
+		}
 	}
 
 	rcu_read_unlock();
@@ -1792,57 +1955,6 @@ static void ath_tx_txqaddbuf(struct ath_
 	}
 }
 
-static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_txq *txq,
-			      struct ath_atx_tid *tid, struct sk_buff *skb,
-			      struct ath_tx_control *txctl)
-{
-	struct ath_frame_info *fi = get_frame_info(skb);
-	struct list_head bf_head;
-	struct ath_buf *bf;
-
-	/*
-	 * Do not queue to h/w when any of the following conditions is true:
-	 * - there are pending frames in software queue
-	 * - the TID is currently paused for ADDBA/BAR request
-	 * - seqno is not within block-ack window
-	 * - h/w queue depth exceeds low water mark
-	 */
-	if ((!skb_queue_empty(&tid->buf_q) || tid->paused ||
-	     !BAW_WITHIN(tid->seq_start, tid->baw_size, tid->seq_next) ||
-	     txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) &&
-	    txq != sc->tx.uapsdq) {
-		/*
-		 * Add this frame to software queue for scheduling later
-		 * for aggregation.
-		 */
-		TX_STAT_INC(txq->axq_qnum, a_queued_sw);
-		__skb_queue_tail(&tid->buf_q, skb);
-		if (!txctl->an || !txctl->an->sleeping)
-			ath_tx_queue_tid(txq, tid);
-		return;
-	}
-
-	bf = ath_tx_setup_buffer(sc, txq, tid, skb);
-	if (!bf) {
-		ieee80211_free_txskb(sc->hw, skb);
-		return;
-	}
-
-	ath_set_rates(tid->an->vif, tid->an->sta, bf);
-	bf->bf_state.bf_type = BUF_AMPDU;
-	INIT_LIST_HEAD(&bf_head);
-	list_add(&bf->list, &bf_head);
-
-	/* Add sub-frame to BAW */
-	ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
-
-	/* Queue to h/w without aggregation */
-	TX_STAT_INC(txq->axq_qnum, a_queued_hw);
-	bf->bf_lastbf = bf;
-	ath_tx_fill_desc(sc, bf, txq, fi->framelen);
-	ath_tx_txqaddbuf(sc, txq, &bf_head, false);
-}
-
 static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
 			       struct ath_atx_tid *tid, struct sk_buff *skb)
 {
@@ -1985,6 +2097,7 @@ static int ath_tx_prepare(struct ieee802
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_sta *sta = txctl->sta;
 	struct ieee80211_vif *vif = info->control.vif;
+	struct ath_vif *avp;
 	struct ath_softc *sc = hw->priv;
 	int frmlen = skb->len + FCS_LEN;
 	int padpos, padsize;
@@ -1992,6 +2105,10 @@ static int ath_tx_prepare(struct ieee802
 	/* NOTE:  sta can be NULL according to net/mac80211.h */
 	if (sta)
 		txctl->an = (struct ath_node *)sta->drv_priv;
+	else if (vif && ieee80211_is_data(hdr->frame_control)) {
+		avp = (void *)vif->drv_priv;
+		txctl->an = &avp->mcast_node;
+	}
 
 	if (info->control.hw_key)
 		frmlen += info->control.hw_key->icv_len;
@@ -2041,7 +2158,6 @@ int ath_tx_start(struct ieee80211_hw *hw
 	struct ath_txq *txq = txctl->txq;
 	struct ath_atx_tid *tid = NULL;
 	struct ath_buf *bf;
-	u8 tidno;
 	int q;
 	int ret;
 
@@ -2069,27 +2185,31 @@ int ath_tx_start(struct ieee80211_hw *hw
 		ath_txq_unlock(sc, txq);
 		txq = sc->tx.uapsdq;
 		ath_txq_lock(sc, txq);
-	}
-
-	if (txctl->an && ieee80211_is_data_qos(hdr->frame_control)) {
-		tidno = ieee80211_get_qos_ctl(hdr)[0] &
-			IEEE80211_QOS_CTL_TID_MASK;
-		tid = ATH_AN_2_TID(txctl->an, tidno);
+	} else if (txctl->an &&
+		   ieee80211_is_data_present(hdr->frame_control)) {
+		tid = ath_get_skb_tid(sc, txctl->an, skb);
 
 		WARN_ON(tid->ac->txq != txctl->txq);
-	}
 
-	if ((info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
+		if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
+			tid->ac->clear_ps_filter = true;
+
 		/*
-		 * Try aggregation if it's a unicast data frame
-		 * and the destination is HT capable.
+		 * Add this frame to software queue for scheduling later
+		 * for aggregation.
 		 */
-		ath_tx_send_ampdu(sc, txq, tid, skb, txctl);
+		TX_STAT_INC(txq->axq_qnum, a_queued_sw);
+		__skb_queue_tail(&tid->buf_q, skb);
+		if (!txctl->an->sleeping)
+			ath_tx_queue_tid(txq, tid);
+
+		ath_txq_schedule(sc, txq);
 		goto out;
 	}
 
 	bf = ath_tx_setup_buffer(sc, txq, tid, skb);
 	if (!bf) {
+		ath_txq_skb_done(sc, txq, skb);
 		if (txctl->paprd)
 			dev_kfree_skb_any(skb);
 		else
@@ -2142,7 +2262,7 @@ void ath_tx_cabq(struct ieee80211_hw *hw
 
 		bf->bf_lastbf = bf;
 		ath_set_rates(vif, NULL, bf);
-		ath_buf_set_rate(sc, bf, &info, fi->framelen);
+		ath_buf_set_rate(sc, bf, &info, fi->framelen, false);
 		duration += info.rates[0].PktDuration;
 		if (bf_tail)
 			bf_tail->bf_next = bf;
@@ -2189,7 +2309,7 @@ static void ath_tx_complete(struct ath_s
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
-	int q, padpos, padsize;
+	int padpos, padsize;
 	unsigned long flags;
 
 	ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb);
@@ -2225,21 +2345,7 @@ static void ath_tx_complete(struct ath_s
 	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 
 	__skb_queue_tail(&txq->complete_q, skb);
-
-	q = skb_get_queue_mapping(skb);
-	if (txq == sc->tx.uapsdq)
-		txq = sc->tx.txq_map[q];
-
-	if (txq == sc->tx.txq_map[q]) {
-		if (WARN_ON(--txq->pending_frames < 0))
-			txq->pending_frames = 0;
-
-		if (txq->stopped &&
-		    txq->pending_frames < sc->tx.txq_max_pending[q]) {
-			ieee80211_wake_queue(sc->hw, q);
-			txq->stopped = false;
-		}
-	}
+	ath_txq_skb_done(sc, txq, skb);
 }
 
 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
@@ -2360,8 +2466,7 @@ static void ath_tx_processq(struct ath_s
 
 		if (list_empty(&txq->axq_q)) {
 			txq->axq_link = NULL;
-			if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
-				ath_txq_schedule(sc, txq);
+			ath_txq_schedule(sc, txq);
 			break;
 		}
 		bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
@@ -2375,7 +2480,7 @@ static void ath_tx_processq(struct ath_s
 		 * it with the STALE flag.
 		 */
 		bf_held = NULL;
-		if (bf->bf_stale) {
+		if (bf->bf_state.stale) {
 			bf_held = bf;
 			if (list_is_last(&bf_held->list, &txq->axq_q))
 				break;
@@ -2399,7 +2504,7 @@ static void ath_tx_processq(struct ath_s
 		 * however leave the last descriptor back as the holding
 		 * descriptor for hw.
 		 */
-		lastbf->bf_stale = true;
+		lastbf->bf_state.stale = true;
 		INIT_LIST_HEAD(&bf_head);
 		if (!list_is_singular(&lastbf->list))
 			list_cut_position(&bf_head,
@@ -2470,7 +2575,7 @@ void ath_tx_edma_tasklet(struct ath_soft
 		}
 
 		bf = list_first_entry(fifo_list, struct ath_buf, list);
-		if (bf->bf_stale) {
+		if (bf->bf_state.stale) {
 			list_del(&bf->list);
 			ath_tx_return_buffer(sc, bf);
 			bf = list_first_entry(fifo_list, struct ath_buf, list);
@@ -2492,7 +2597,7 @@ void ath_tx_edma_tasklet(struct ath_soft
 				ath_tx_txqaddbuf(sc, txq, &bf_q, true);
 			}
 		} else {
-			lastbf->bf_stale = true;
+			lastbf->bf_state.stale = true;
 			if (bf != lastbf)
 				list_cut_position(&bf_head, fifo_list,
 						  lastbf->list.prev);
@@ -2583,6 +2688,7 @@ void ath_tx_node_init(struct ath_softc *
 		tid->paused    = false;
 		tid->active	   = false;
 		__skb_queue_head_init(&tid->buf_q);
+		__skb_queue_head_init(&tid->retry_q);
 		acno = TID_TO_WME_AC(tidno);
 		tid->ac = &an->ac[acno];
 	}
@@ -2590,6 +2696,7 @@ void ath_tx_node_init(struct ath_softc *
 	for (acno = 0, ac = &an->ac[acno];
 	     acno < IEEE80211_NUM_ACS; acno++, ac++) {
 		ac->sched    = false;
+		ac->clear_ps_filter = true;
 		ac->txq = sc->tx.txq_map[acno];
 		INIT_LIST_HEAD(&ac->tid_q);
 	}
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -173,8 +173,7 @@ static void ath_restart_work(struct ath_
 {
 	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 
-	if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9485(sc->sc_ah) ||
-	    AR_SREV_9550(sc->sc_ah))
+	if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah))
 		ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
 				     msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
 
@@ -238,9 +237,6 @@ static bool ath_complete_reset(struct at
 		ath_restart_work(sc);
 	}
 
-	if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3)
-		ath_ant_comb_update(sc);
-
 	ieee80211_wake_queues(sc->hw);
 
 	return true;
@@ -966,6 +962,8 @@ static int ath9k_add_interface(struct ie
 	struct ath_softc *sc = hw->priv;
 	struct ath_hw *ah = sc->sc_ah;
 	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath_vif *avp = (void *)vif->drv_priv;
+	struct ath_node *an = &avp->mcast_node;
 
 	mutex_lock(&sc->mutex);
 
@@ -979,6 +977,12 @@ static int ath9k_add_interface(struct ie
 	if (ath9k_uses_beacons(vif->type))
 		ath9k_beacon_assign_slot(sc, vif);
 
+	an->sc = sc;
+	an->sta = NULL;
+	an->vif = vif;
+	an->no_ps_filter = true;
+	ath_tx_node_init(sc, an);
+
 	mutex_unlock(&sc->mutex);
 	return 0;
 }
@@ -1016,6 +1020,7 @@ static void ath9k_remove_interface(struc
 {
 	struct ath_softc *sc = hw->priv;
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ath_vif *avp = (void *)vif->drv_priv;
 
 	ath_dbg(common, CONFIG, "Detach Interface\n");
 
@@ -1030,6 +1035,8 @@ static void ath9k_remove_interface(struc
 	ath9k_calculate_summary_state(hw, NULL);
 	ath9k_ps_restore(sc);
 
+	ath_tx_node_cleanup(sc, &avp->mcast_node);
+
 	mutex_unlock(&sc->mutex);
 }
 
@@ -1193,8 +1200,6 @@ static int ath9k_config(struct ieee80211
 
 	if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
 		struct ieee80211_channel *curchan = hw->conf.chandef.chan;
-		enum nl80211_channel_type channel_type =
-			cfg80211_get_chandef_type(&conf->chandef);
 		int pos = curchan->hw_value;
 		int old_pos = -1;
 		unsigned long flags;
@@ -1202,8 +1207,8 @@ static int ath9k_config(struct ieee80211
 		if (ah->curchan)
 			old_pos = ah->curchan - &ah->channels[0];
 
-		ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
-			curchan->center_freq, channel_type);
+		ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n",
+			curchan->center_freq, hw->conf.chandef.width);
 
 		/* update survey stats for the old channel before switching */
 		spin_lock_irqsave(&common->cc_lock, flags);
@@ -1211,7 +1216,7 @@ static int ath9k_config(struct ieee80211
 		spin_unlock_irqrestore(&common->cc_lock, flags);
 
 		ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
-					  curchan, channel_type);
+					  &conf->chandef);
 
 		/*
 		 * If the operating channel changes, change the survey in-use flags
@@ -1374,9 +1379,6 @@ static void ath9k_sta_notify(struct ieee
 	struct ath_softc *sc = hw->priv;
 	struct ath_node *an = (struct ath_node *) sta->drv_priv;
 
-	if (!sta->ht_cap.ht_supported)
-		return;
-
 	switch (cmd) {
 	case STA_NOTIFY_SLEEP:
 		an->sleeping = true;
@@ -2094,7 +2096,7 @@ static void ath9k_wow_add_pattern(struct
 {
 	struct ath_hw *ah = sc->sc_ah;
 	struct ath9k_wow_pattern *wow_pattern = NULL;
-	struct cfg80211_wowlan_trig_pkt_pattern *patterns = wowlan->patterns;
+	struct cfg80211_pkt_pattern *patterns = wowlan->patterns;
 	int mask_len;
 	s8 i = 0;
 
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -2298,8 +2298,7 @@ EXPORT_SYMBOL_GPL(mwifiex_del_virtual_in
 
 #ifdef CONFIG_PM
 static bool
-mwifiex_is_pattern_supported(struct cfg80211_wowlan_trig_pkt_pattern *pat,
-			     s8 *byte_seq)
+mwifiex_is_pattern_supported(struct cfg80211_pkt_pattern *pat, s8 *byte_seq)
 {
 	int j, k, valid_byte_cnt = 0;
 	bool dont_care_byte = false;
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -1315,7 +1315,7 @@ static struct sk_buff *wl12xx_alloc_dumm
 
 #ifdef CONFIG_PM
 static int
-wl1271_validate_wowlan_pattern(struct cfg80211_wowlan_trig_pkt_pattern *p)
+wl1271_validate_wowlan_pattern(struct cfg80211_pkt_pattern *p)
 {
 	int num_fields = 0, in_field = 0, fields_size = 0;
 	int i, pattern_len = 0;
@@ -1458,9 +1458,9 @@ void wl1271_rx_filter_flatten_fields(str
  * Allocates an RX filter returned through f
  * which needs to be freed using rx_filter_free()
  */
-static int wl1271_convert_wowlan_pattern_to_rx_filter(
-	struct cfg80211_wowlan_trig_pkt_pattern *p,
-	struct wl12xx_rx_filter **f)
+static int
+wl1271_convert_wowlan_pattern_to_rx_filter(struct cfg80211_pkt_pattern *p,
+					   struct wl12xx_rx_filter **f)
 {
 	int i, j, ret = 0;
 	struct wl12xx_rx_filter *filter;
@@ -1562,7 +1562,7 @@ static int wl1271_configure_wowlan(struc
 
 	/* Translate WoWLAN patterns into filters */
 	for (i = 0; i < wow->n_patterns; i++) {
-		struct cfg80211_wowlan_trig_pkt_pattern *p;
+		struct cfg80211_pkt_pattern *p;
 		struct wl12xx_rx_filter *filter = NULL;
 
 		p = &wow->patterns[i];
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -639,6 +639,30 @@ struct cfg80211_ap_settings {
 };
 
 /**
+ * struct cfg80211_csa_settings - channel switch settings
+ *
+ * Used for channel switch
+ *
+ * @chandef: defines the channel to use after the switch
+ * @beacon_csa: beacon data while performing the switch
+ * @counter_offset_beacon: offset for the counter within the beacon (tail)
+ * @counter_offset_presp: offset for the counter within the probe response
+ * @beacon_after: beacon data to be used on the new channel
+ * @radar_required: whether radar detection is required on the new channel
+ * @block_tx: whether transmissions should be blocked while changing
+ * @count: number of beacons until switch
+ */
+struct cfg80211_csa_settings {
+	struct cfg80211_chan_def chandef;
+	struct cfg80211_beacon_data beacon_csa;
+	u16 counter_offset_beacon, counter_offset_presp;
+	struct cfg80211_beacon_data beacon_after;
+	bool radar_required;
+	bool block_tx;
+	u8 count;
+};
+
+/**
  * enum station_parameters_apply_mask - station parameter values to apply
  * @STATION_PARAM_APPLY_UAPSD: apply new uAPSD parameters (uapsd_queues, max_sp)
  * @STATION_PARAM_APPLY_CAPABILITY: apply new capability
@@ -1698,7 +1722,7 @@ struct cfg80211_pmksa {
 };
 
 /**
- * struct cfg80211_wowlan_trig_pkt_pattern - packet pattern
+ * struct cfg80211_pkt_pattern - packet pattern
  * @mask: bitmask where to match pattern and where to ignore bytes,
  *	one bit per byte, in same format as nl80211
  * @pattern: bytes to match where bitmask is 1
@@ -1708,7 +1732,7 @@ struct cfg80211_pmksa {
  * Internal note: @mask and @pattern are allocated in one chunk of
  * memory, free @mask only!
  */
-struct cfg80211_wowlan_trig_pkt_pattern {
+struct cfg80211_pkt_pattern {
 	u8 *mask, *pattern;
 	int pattern_len;
 	int pkt_offset;
@@ -1770,7 +1794,7 @@ struct cfg80211_wowlan {
 	bool any, disconnect, magic_pkt, gtk_rekey_failure,
 	     eap_identity_req, four_way_handshake,
 	     rfkill_release;
-	struct cfg80211_wowlan_trig_pkt_pattern *patterns;
+	struct cfg80211_pkt_pattern *patterns;
 	struct cfg80211_wowlan_tcp *tcp;
 	int n_patterns;
 };
@@ -2071,6 +2095,8 @@ struct cfg80211_update_ft_ies_params {
  *	driver can take the most appropriate actions.
  * @crit_proto_stop: Indicates critical protocol no longer needs increased link
  *	reliability. This operation can not fail.
+ *
+ * @channel_switch: initiate channel-switch procedure (with CSA)
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -2306,6 +2332,10 @@ struct cfg80211_ops {
 				    u16 duration);
 	void	(*crit_proto_stop)(struct wiphy *wiphy,
 				   struct wireless_dev *wdev);
+
+	int	(*channel_switch)(struct wiphy *wiphy,
+				  struct net_device *dev,
+				  struct cfg80211_csa_settings *params);
 };
 
 /*
@@ -2371,6 +2401,8 @@ struct cfg80211_ops {
  * @WIPHY_FLAG_OFFCHAN_TX: Device supports direct off-channel TX.
  * @WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL: Device supports remain-on-channel call.
  * @WIPHY_FLAG_SUPPORTS_5_10_MHZ: Device supports 5 MHz and 10 MHz channels.
+ * @WIPHY_FLAG_HAS_CHANNEL_SWITCH: Device supports channel switch in
+ *	beaconing mode (AP, IBSS, Mesh, ...).
  */
 enum wiphy_flags {
 	WIPHY_FLAG_CUSTOM_REGULATORY		= BIT(0),
@@ -2395,6 +2427,7 @@ enum wiphy_flags {
 	WIPHY_FLAG_OFFCHAN_TX			= BIT(20),
 	WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL	= BIT(21),
 	WIPHY_FLAG_SUPPORTS_5_10_MHZ		= BIT(22),
+	WIPHY_FLAG_HAS_CHANNEL_SWITCH		= BIT(23),
 };
 
 /**
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -648,6 +648,16 @@
  * @NL80211_CMD_CRIT_PROTOCOL_STOP: Indicates the connection reliability can
  *	return back to normal.
  *
+ * @NL80211_CMD_CHANNEL_SWITCH: Perform a channel switch by announcing the
+ *	the new channel information (Channel Switch Announcement - CSA)
+ *	in the beacon for some time (as defined in the
+ *	%NL80211_ATTR_CH_SWITCH_COUNT parameter) and then change to the
+ *	new channel. Userspace provides the new channel information (using
+ *	%NL80211_ATTR_WIPHY_FREQ and the attributes determining channel
+ *	width). %NL80211_ATTR_CH_SWITCH_BLOCK_TX may be supplied to inform
+ *	other station that transmission must be blocked until the channel
+ *	switch is complete.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -810,6 +820,8 @@ enum nl80211_commands {
 	NL80211_CMD_CRIT_PROTOCOL_START,
 	NL80211_CMD_CRIT_PROTOCOL_STOP,
 
+	NL80211_CMD_CHANNEL_SWITCH,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -1436,6 +1448,18 @@ enum nl80211_commands {
  *	allowed to be used with the first @NL80211_CMD_SET_STATION command to
  *	update a TDLS peer STA entry.
  *
+ * @NL80211_ATTR_CH_SWITCH_COUNT: u32 attribute specifying the number of TBTT's
+ *	until the channel switch event.
+ * @NL80211_ATTR_CH_SWITCH_BLOCK_TX: flag attribute specifying that transmission
+ *	must be blocked on the current channel (before the channel switch
+ *	operation).
+ * @NL80211_ATTR_CSA_IES: Nested set of attributes containing the IE information
+ *	for the time while performing a channel switch.
+ * @NL80211_ATTR_CSA_C_OFF_BEACON: Offset of the channel switch counter
+ *	field in the beacons tail (%NL80211_ATTR_BEACON_TAIL).
+ * @NL80211_ATTR_CSA_C_OFF_PRESP: Offset of the channel switch counter
+ *	field in the probe response (%NL80211_ATTR_PROBE_RESP).
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1736,6 +1760,12 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_PEER_AID,
 
+	NL80211_ATTR_CH_SWITCH_COUNT,
+	NL80211_ATTR_CH_SWITCH_BLOCK_TX,
+	NL80211_ATTR_CSA_IES,
+	NL80211_ATTR_CSA_C_OFF_BEACON,
+	NL80211_ATTR_CSA_C_OFF_PRESP,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -3060,11 +3090,11 @@ enum nl80211_tx_power_setting {
 };
 
 /**
- * enum nl80211_wowlan_packet_pattern_attr - WoWLAN packet pattern attribute
- * @__NL80211_WOWLAN_PKTPAT_INVALID: invalid number for nested attribute
- * @NL80211_WOWLAN_PKTPAT_PATTERN: the pattern, values where the mask has
+ * enum nl80211_packet_pattern_attr - packet pattern attribute
+ * @__NL80211_PKTPAT_INVALID: invalid number for nested attribute
+ * @NL80211_PKTPAT_PATTERN: the pattern, values where the mask has
  *	a zero bit are ignored
- * @NL80211_WOWLAN_PKTPAT_MASK: pattern mask, must be long enough to have
+ * @NL80211_PKTPAT_MASK: pattern mask, must be long enough to have
  *	a bit for each byte in the pattern. The lowest-order bit corresponds
  *	to the first byte of the pattern, but the bytes of the pattern are
  *	in a little-endian-like format, i.e. the 9th byte of the pattern
@@ -3075,23 +3105,23 @@ enum nl80211_tx_power_setting {
  *	Note that the pattern matching is done as though frames were not
  *	802.11 frames but 802.3 frames, i.e. the frame is fully unpacked
  *	first (including SNAP header unpacking) and then matched.
- * @NL80211_WOWLAN_PKTPAT_OFFSET: packet offset, pattern is matched after
+ * @NL80211_PKTPAT_OFFSET: packet offset, pattern is matched after
  *	these fixed number of bytes of received packet
- * @NUM_NL80211_WOWLAN_PKTPAT: number of attributes
- * @MAX_NL80211_WOWLAN_PKTPAT: max attribute number
+ * @NUM_NL80211_PKTPAT: number of attributes
+ * @MAX_NL80211_PKTPAT: max attribute number
  */
-enum nl80211_wowlan_packet_pattern_attr {
-	__NL80211_WOWLAN_PKTPAT_INVALID,
-	NL80211_WOWLAN_PKTPAT_MASK,
-	NL80211_WOWLAN_PKTPAT_PATTERN,
-	NL80211_WOWLAN_PKTPAT_OFFSET,
+enum nl80211_packet_pattern_attr {
+	__NL80211_PKTPAT_INVALID,
+	NL80211_PKTPAT_MASK,
+	NL80211_PKTPAT_PATTERN,
+	NL80211_PKTPAT_OFFSET,
 
-	NUM_NL80211_WOWLAN_PKTPAT,
-	MAX_NL80211_WOWLAN_PKTPAT = NUM_NL80211_WOWLAN_PKTPAT - 1,
+	NUM_NL80211_PKTPAT,
+	MAX_NL80211_PKTPAT = NUM_NL80211_PKTPAT - 1,
 };
 
 /**
- * struct nl80211_wowlan_pattern_support - pattern support information
+ * struct nl80211_pattern_support - packet pattern support information
  * @max_patterns: maximum number of patterns supported
  * @min_pattern_len: minimum length of each pattern
  * @max_pattern_len: maximum length of each pattern
@@ -3101,13 +3131,22 @@ enum nl80211_wowlan_packet_pattern_attr 
  * that is part of %NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED in the
  * capability information given by the kernel to userspace.
  */
-struct nl80211_wowlan_pattern_support {
+struct nl80211_pattern_support {
 	__u32 max_patterns;
 	__u32 min_pattern_len;
 	__u32 max_pattern_len;
 	__u32 max_pkt_offset;
 } __attribute__((packed));
 
+/* only for backward compatibility */
+#define __NL80211_WOWLAN_PKTPAT_INVALID __NL80211_PKTPAT_INVALID
+#define NL80211_WOWLAN_PKTPAT_MASK NL80211_PKTPAT_MASK
+#define NL80211_WOWLAN_PKTPAT_PATTERN NL80211_PKTPAT_PATTERN
+#define NL80211_WOWLAN_PKTPAT_OFFSET NL80211_PKTPAT_OFFSET
+#define NUM_NL80211_WOWLAN_PKTPAT NUM_NL80211_PKTPAT
+#define MAX_NL80211_WOWLAN_PKTPAT MAX_NL80211_PKTPAT
+#define nl80211_wowlan_pattern_support nl80211_pattern_support
+
 /**
  * enum nl80211_wowlan_triggers - WoWLAN trigger definitions
  * @__NL80211_WOWLAN_TRIG_INVALID: invalid number for nested attributes
@@ -3127,7 +3166,7 @@ struct nl80211_wowlan_pattern_support {
  *	pattern matching is done after the packet is converted to the MSDU.
  *
  *	In %NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED, it is a binary attribute
- *	carrying a &struct nl80211_wowlan_pattern_support.
+ *	carrying a &struct nl80211_pattern_support.
  *
  *	When reporting wakeup. it is a u32 attribute containing the 0-based
  *	index of the pattern that caused the wakeup, in the patterns passed
@@ -3284,7 +3323,7 @@ struct nl80211_wowlan_tcp_data_token_fea
  * @NL80211_WOWLAN_TCP_WAKE_PAYLOAD: wake packet payload, for advertising a
  *	u32 attribute holding the maximum length
  * @NL80211_WOWLAN_TCP_WAKE_MASK: Wake packet payload mask, not used for
- *	feature advertising. The mask works like @NL80211_WOWLAN_PKTPAT_MASK
+ *	feature advertising. The mask works like @NL80211_PKTPAT_MASK
  *	but on the TCP payload only.
  * @NUM_NL80211_WOWLAN_TCP: number of TCP attributes
  * @MAX_NL80211_WOWLAN_TCP: highest attribute number
--- a/net/mac80211/mesh_ps.c
+++ b/net/mac80211/mesh_ps.c
@@ -229,6 +229,10 @@ void ieee80211_mps_sta_status_update(str
 	enum nl80211_mesh_power_mode pm;
 	bool do_buffer;
 
+	/* For non-assoc STA, prevent buffering or frame transmission */
+	if (sta->sta_state < IEEE80211_STA_ASSOC)
+		return;
+
 	/*
 	 * use peer-specific power mode if peering is established and the
 	 * peer's power mode is known
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -349,6 +349,11 @@ static const struct nla_policy nl80211_p
 	[NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 				  .len = IEEE80211_MAX_DATA_LEN },
 	[NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
+	[NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
+	[NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
+	[NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
+	[NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_U16 },
+	[NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_U16 },
 };
 
 /* policy for the key attributes */
@@ -441,10 +446,12 @@ static int nl80211_prepare_wdev_dump(str
 			goto out_unlock;
 		}
 		*rdev = wiphy_to_dev((*wdev)->wiphy);
-		cb->args[0] = (*rdev)->wiphy_idx;
+		/* 0 is the first index - add 1 to parse only once */
+		cb->args[0] = (*rdev)->wiphy_idx + 1;
 		cb->args[1] = (*wdev)->identifier;
 	} else {
-		struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0]);
+		/* subtract the 1 again here */
+		struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 		struct wireless_dev *tmp;
 
 		if (!wiphy) {
@@ -974,7 +981,7 @@ static int nl80211_send_wowlan(struct sk
 		return -ENOBUFS;
 
 	if (dev->wiphy.wowlan->n_patterns) {
-		struct nl80211_wowlan_pattern_support pat = {
+		struct nl80211_pattern_support pat = {
 			.max_patterns = dev->wiphy.wowlan->n_patterns,
 			.min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
 			.max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
@@ -1393,6 +1400,8 @@ static int nl80211_send_wiphy(struct cfg
 		if (state->split) {
 			CMD(crit_proto_start, CRIT_PROTOCOL_START);
 			CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
+			if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
+				CMD(channel_switch, CHANNEL_SWITCH);
 		}
 
 #ifdef CPTCFG_NL80211_TESTMODE
@@ -1568,8 +1577,10 @@ static int nl80211_dump_wiphy(struct sk_
 	rtnl_lock();
 	if (!state) {
 		state = kzalloc(sizeof(*state), GFP_KERNEL);
-		if (!state)
+		if (!state) {
+			rtnl_unlock();
 			return -ENOMEM;
+		}
 		state->filter_wiphy = -1;
 		ret = nl80211_dump_wiphy_parse(skb, cb, state);
 		if (ret) {
@@ -2620,8 +2631,8 @@ static int nl80211_get_key(struct sk_buf
 
 	hdr = nl80211hdr_put(msg, genl_info_snd_portid(info), info->snd_seq, 0,
 			     NL80211_CMD_NEW_KEY);
-	if (IS_ERR(hdr))
-		return PTR_ERR(hdr);
+	if (!hdr)
+		return -ENOBUFS;
 
 	cookie.msg = msg;
 	cookie.idx = key_idx;
@@ -4770,9 +4781,9 @@ do {									    \
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
 				  mask, NL80211_MESHCONF_FORWARDING,
 				  nla_get_u8);
-	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
+	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
 				  mask, NL80211_MESHCONF_RSSI_THRESHOLD,
-				  nla_get_u32);
+				  nla_get_s32);
 	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
 				  mask, NL80211_MESHCONF_HT_OPMODE,
 				  nla_get_u16);
@@ -5578,6 +5589,111 @@ static int nl80211_start_radar_detection
 	return err;
 }
 
+static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev = info->user_ptr[0];
+	struct net_device *dev = info->user_ptr[1];
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct cfg80211_csa_settings params;
+	/* csa_attrs is defined static to avoid waste of stack size - this
+	 * function is called under RTNL lock, so this should not be a problem.
+	 */
+	static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
+	u8 radar_detect_width = 0;
+	int err;
+
+	if (!rdev->ops->channel_switch ||
+	    !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
+		return -EOPNOTSUPP;
+
+	/* may add IBSS support later */
+	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
+	    dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
+		return -EOPNOTSUPP;
+
+	memset(&params, 0, sizeof(params));
+
+	if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
+	    !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
+		return -EINVAL;
+
+	/* only important for AP, IBSS and mesh create IEs internally */
+	if (!info->attrs[NL80211_ATTR_CSA_IES])
+		return -EINVAL;
+
+	/* useless if AP is not running */
+	if (!wdev->beacon_interval)
+		return -EINVAL;
+
+	params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
+
+	err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
+	if (err)
+		return err;
+
+	err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
+			       info->attrs[NL80211_ATTR_CSA_IES],
+			       nl80211_policy);
+	if (err)
+		return err;
+
+	err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
+	if (err)
+		return err;
+
+	if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
+		return -EINVAL;
+
+	params.counter_offset_beacon =
+		nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
+	if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
+		return -EINVAL;
+
+	/* sanity check - counters should be the same */
+	if (params.beacon_csa.tail[params.counter_offset_beacon] !=
+	    params.count)
+		return -EINVAL;
+
+	if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
+		params.counter_offset_presp =
+			nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
+		if (params.counter_offset_presp >=
+		    params.beacon_csa.probe_resp_len)
+			return -EINVAL;
+
+		if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
+		    params.count)
+			return -EINVAL;
+	}
+
+	err = nl80211_parse_chandef(rdev, info, &params.chandef);
+	if (err)
+		return err;
+
+	if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
+		return -EINVAL;
+
+	err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
+	if (err < 0) {
+		return err;
+	} else if (err) {
+		radar_detect_width = BIT(params.chandef.width);
+		params.radar_required = true;
+	}
+
+	err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
+					   params.chandef.chan,
+					   CHAN_MODE_SHARED,
+					   radar_detect_width);
+	if (err)
+		return err;
+
+	if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
+		params.block_tx = true;
+
+	return rdev_channel_switch(rdev, dev, &params);
+}
+
 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
 			    u32 seq, int flags,
 			    struct cfg80211_registered_device *rdev,
@@ -6507,6 +6623,9 @@ static int nl80211_testmode_dump(struct 
 					   NL80211_CMD_TESTMODE);
 		struct nlattr *tmdata;
 
+		if (!hdr)
+			break;
+
 		if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
 			genlmsg_cancel(skb, hdr);
 			break;
@@ -6615,12 +6734,14 @@ EXPORT_SYMBOL(cfg80211_testmode_alloc_ev
 
 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
 {
+	struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
 	void *hdr = ((void **)skb->cb)[1];
 	struct nlattr *data = ((void **)skb->cb)[2];
 
 	nla_nest_end(skb, data);
 	genlmsg_end(skb, hdr);
-	genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
+	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
+				nl80211_testmode_mcgrp.id, gfp);
 }
 EXPORT_SYMBOL(cfg80211_testmode_event);
 #endif
@@ -6949,9 +7070,8 @@ static int nl80211_remain_on_channel(str
 
 	hdr = nl80211hdr_put(msg, genl_info_snd_portid(info), info->snd_seq, 0,
 			     NL80211_CMD_REMAIN_ON_CHANNEL);
-
-	if (IS_ERR(hdr)) {
-		err = PTR_ERR(hdr);
+	if (!hdr) {
+		err = -ENOBUFS;
 		goto free_msg;
 	}
 
@@ -7249,9 +7369,8 @@ static int nl80211_tx_mgmt(struct sk_buf
 
 		hdr = nl80211hdr_put(msg, genl_info_snd_portid(info), info->snd_seq, 0,
 				     NL80211_CMD_FRAME);
-
-		if (IS_ERR(hdr)) {
-			err = PTR_ERR(hdr);
+		if (!hdr) {
+			err = -ENOBUFS;
 			goto free_msg;
 		}
 	}
@@ -7593,12 +7712,11 @@ static int nl80211_send_wowlan_patterns(
 		if (!nl_pat)
 			return -ENOBUFS;
 		pat_len = wowlan->patterns[i].pattern_len;
-		if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
-			    DIV_ROUND_UP(pat_len, 8),
+		if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
 			    wowlan->patterns[i].mask) ||
-		    nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
-			    pat_len, wowlan->patterns[i].pattern) ||
-		    nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
+		    nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
+			    wowlan->patterns[i].pattern) ||
+		    nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
 				wowlan->patterns[i].pkt_offset))
 			return -ENOBUFS;
 		nla_nest_end(msg, nl_pat);
@@ -7939,7 +8057,7 @@ static int nl80211_set_wowlan(struct sk_
 		struct nlattr *pat;
 		int n_patterns = 0;
 		int rem, pat_len, mask_len, pkt_offset;
-		struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
+		struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
 
 		nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
 				    rem)
@@ -7958,26 +8076,25 @@ static int nl80211_set_wowlan(struct sk_
 
 		nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
 				    rem) {
-			nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
-				  nla_data(pat), nla_len(pat), NULL);
+			nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
+				  nla_len(pat), NULL);
 			err = -EINVAL;
-			if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
-			    !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
+			if (!pat_tb[NL80211_PKTPAT_MASK] ||
+			    !pat_tb[NL80211_PKTPAT_PATTERN])
 				goto error;
-			pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
+			pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
 			mask_len = DIV_ROUND_UP(pat_len, 8);
-			if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
-			    mask_len)
+			if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
 				goto error;
 			if (pat_len > wowlan->pattern_max_len ||
 			    pat_len < wowlan->pattern_min_len)
 				goto error;
 
-			if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
+			if (!pat_tb[NL80211_PKTPAT_OFFSET])
 				pkt_offset = 0;
 			else
 				pkt_offset = nla_get_u32(
-					pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
+					pat_tb[NL80211_PKTPAT_OFFSET]);
 			if (pkt_offset > wowlan->max_pkt_offset)
 				goto error;
 			new_triggers.patterns[i].pkt_offset = pkt_offset;
@@ -7991,11 +8108,11 @@ static int nl80211_set_wowlan(struct sk_
 			new_triggers.patterns[i].pattern =
 				new_triggers.patterns[i].mask + mask_len;
 			memcpy(new_triggers.patterns[i].mask,
-			       nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
+			       nla_data(pat_tb[NL80211_PKTPAT_MASK]),
 			       mask_len);
 			new_triggers.patterns[i].pattern_len = pat_len;
 			memcpy(new_triggers.patterns[i].pattern,
-			       nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
+			       nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
 			       pat_len);
 			i++;
 		}
@@ -8130,9 +8247,8 @@ static int nl80211_probe_client(struct s
 
 	hdr = nl80211hdr_put(msg, genl_info_snd_portid(info), info->snd_seq, 0,
 			     NL80211_CMD_PROBE_CLIENT);
-
-	if (IS_ERR(hdr)) {
-		err = PTR_ERR(hdr);
+	if (!hdr) {
+		err = -ENOBUFS;
 		goto free_msg;
 	}
 
@@ -9041,7 +9157,15 @@ static struct genl_ops nl80211_ops[] = {
 		.flags = GENL_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
-	}
+	},
+	{
+		.cmd = NL80211_CMD_CHANNEL_SWITCH,
+		.doit = nl80211_channel_switch,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+				  NL80211_FLAG_NEED_RTNL,
+	},
 };
 
 static struct genl_multicast_group nl80211_mlme_mcgrp = {
@@ -10066,7 +10190,8 @@ void cfg80211_mgmt_tx_status(struct wire
 
 	genlmsg_end(msg, hdr);
 
-	genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
+	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+				nl80211_mlme_mcgrp.id, gfp);
 	return;
 
  nla_put_failure:
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2247,10 +2247,13 @@ int reg_device_uevent(struct device *dev
 
 void wiphy_regulatory_register(struct wiphy *wiphy)
 {
+	struct regulatory_request *lr;
+
 	if (!reg_dev_ignore_cell_hint(wiphy))
 		reg_num_devs_support_basehint++;
 
-	wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
+	lr = get_last_request();
+	wiphy_update_regulatory(wiphy, lr->initiator);
 }
 
 void wiphy_regulatory_deregister(struct wiphy *wiphy)
@@ -2279,7 +2282,9 @@ void wiphy_regulatory_deregister(struct 
 static void reg_timeout_work(struct work_struct *work)
 {
 	REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
+	rtnl_lock();
 	restore_regulatory_settings(true);
+	rtnl_unlock();
 }
 
 int __init regulatory_init(void)
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -34,8 +34,10 @@ struct cfg80211_conn {
 		CFG80211_CONN_SCAN_AGAIN,
 		CFG80211_CONN_AUTHENTICATE_NEXT,
 		CFG80211_CONN_AUTHENTICATING,
+		CFG80211_CONN_AUTH_FAILED,
 		CFG80211_CONN_ASSOCIATE_NEXT,
 		CFG80211_CONN_ASSOCIATING,
+		CFG80211_CONN_ASSOC_FAILED,
 		CFG80211_CONN_DEAUTH,
 		CFG80211_CONN_CONNECTED,
 	} state;
@@ -164,6 +166,8 @@ static int cfg80211_conn_do_work(struct 
 					  NULL, 0,
 					  params->key, params->key_len,
 					  params->key_idx, NULL, 0);
+	case CFG80211_CONN_AUTH_FAILED:
+		return -ENOTCONN;
 	case CFG80211_CONN_ASSOCIATE_NEXT:
 		BUG_ON(!rdev->ops->assoc);
 		wdev->conn->state = CFG80211_CONN_ASSOCIATING;
@@ -188,10 +192,17 @@ static int cfg80211_conn_do_work(struct 
 					     WLAN_REASON_DEAUTH_LEAVING,
 					     false);
 		return err;
+	case CFG80211_CONN_ASSOC_FAILED:
+		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
+				     NULL, 0,
+				     WLAN_REASON_DEAUTH_LEAVING, false);
+		return -ENOTCONN;
 	case CFG80211_CONN_DEAUTH:
 		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 				     NULL, 0,
 				     WLAN_REASON_DEAUTH_LEAVING, false);
+		/* free directly, disconnected event already sent */
+		cfg80211_sme_free(wdev);
 		return 0;
 	default:
 		return 0;
@@ -371,7 +382,7 @@ bool cfg80211_sme_rx_assoc_resp(struct w
 		return true;
 	}
 
-	wdev->conn->state = CFG80211_CONN_DEAUTH;
+	wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 	schedule_work(&rdev->conn_work);
 	return false;
 }
@@ -383,7 +394,13 @@ void cfg80211_sme_deauth(struct wireless
 
 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 {
-	cfg80211_sme_free(wdev);
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
+
+	if (!wdev->conn)
+		return;
+
+	wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
+	schedule_work(&rdev->conn_work);
 }
 
 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
@@ -399,7 +416,13 @@ void cfg80211_sme_disassoc(struct wirele
 
 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 {
-	cfg80211_sme_disassoc(wdev);
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
+
+	if (!wdev->conn)
+		return;
+
+	wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
+	schedule_work(&rdev->conn_work);
 }
 
 static int cfg80211_sme_connect(struct wireless_dev *wdev,
@@ -953,21 +976,19 @@ int cfg80211_disconnect(struct cfg80211_
 			struct net_device *dev, u16 reason, bool wextev)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
-	int err;
+	int err = 0;
 
 	ASSERT_WDEV_LOCK(wdev);
 
 	kfree(wdev->connect_keys);
 	wdev->connect_keys = NULL;
 
-	if (wdev->conn) {
+	if (wdev->conn)
 		err = cfg80211_sme_disconnect(wdev, reason);
-	} else if (!rdev->ops->disconnect) {
+	else if (!rdev->ops->disconnect)
 		cfg80211_mlme_down(rdev, dev);
-		err = 0;
-	} else {
+	else if (wdev->current_bss)
 		err = rdev_disconnect(rdev, dev, reason);
-	}
 
 	return err;
 }
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -203,6 +203,15 @@ minstrel_update_stats(struct minstrel_pr
 	memcpy(mi->max_tp_rate, tmp_tp_rate, sizeof(mi->max_tp_rate));
 	mi->max_prob_rate = tmp_prob_rate;
 
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	/* use fixed index if set */
+	if (mp->fixed_rate_idx != -1) {
+		mi->max_tp_rate[0] = mp->fixed_rate_idx;
+		mi->max_tp_rate[1] = mp->fixed_rate_idx;
+		mi->max_prob_rate = mp->fixed_rate_idx;
+	}
+#endif
+
 	/* Reset update timer */
 	mi->stats_update = jiffies;
 
@@ -290,7 +299,7 @@ minstrel_get_rate(void *priv, struct iee
 	struct minstrel_rate *msr, *mr;
 	unsigned int ndx;
 	bool mrr_capable;
-	bool prev_sample = mi->prev_sample;
+	bool prev_sample;
 	int delta;
 	int sampling_ratio;
 
@@ -310,10 +319,16 @@ minstrel_get_rate(void *priv, struct iee
 	/* increase sum packet counter */
 	mi->packet_count++;
 
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	if (mp->fixed_rate_idx != -1)
+		return;
+#endif
+
 	delta = (mi->packet_count * sampling_ratio / 100) -
 			(mi->sample_count + mi->sample_deferred / 2);
 
 	/* delta < 0: no sampling required */
+	prev_sample = mi->prev_sample;
 	mi->prev_sample = false;
 	if (delta < 0 || (!mrr_capable && prev_sample))
 		return;
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -936,13 +936,8 @@ void rt2x00queue_index_inc(struct queue_
 	spin_unlock_irqrestore(&queue->index_lock, irqflags);
 }
 
-void rt2x00queue_pause_queue(struct data_queue *queue)
+void rt2x00queue_pause_queue_nocheck(struct data_queue *queue)
 {
-	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
-	    !test_bit(QUEUE_STARTED, &queue->flags) ||
-	    test_and_set_bit(QUEUE_PAUSED, &queue->flags))
-		return;
-
 	switch (queue->qid) {
 	case QID_AC_VO:
 	case QID_AC_VI:
@@ -958,6 +953,15 @@ void rt2x00queue_pause_queue(struct data
 		break;
 	}
 }
+void rt2x00queue_pause_queue(struct data_queue *queue)
+{
+	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
+	    !test_bit(QUEUE_STARTED, &queue->flags) ||
+	    test_and_set_bit(QUEUE_PAUSED, &queue->flags))
+		return;
+
+	rt2x00queue_pause_queue_nocheck(queue);
+}
 EXPORT_SYMBOL_GPL(rt2x00queue_pause_queue);
 
 void rt2x00queue_unpause_queue(struct data_queue *queue)
@@ -1019,7 +1023,7 @@ void rt2x00queue_stop_queue(struct data_
 		return;
 	}
 
-	rt2x00queue_pause_queue(queue);
+	rt2x00queue_pause_queue_nocheck(queue);
 
 	queue->rt2x00dev->ops->lib->stop_queue(queue);
 
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -31,10 +31,12 @@
 #include "led.h"
 
 #define IEEE80211_AUTH_TIMEOUT		(HZ / 5)
+#define IEEE80211_AUTH_TIMEOUT_LONG	(HZ / 2)
 #define IEEE80211_AUTH_TIMEOUT_SHORT	(HZ / 10)
 #define IEEE80211_AUTH_MAX_TRIES	3
 #define IEEE80211_AUTH_WAIT_ASSOC	(HZ * 5)
 #define IEEE80211_ASSOC_TIMEOUT		(HZ / 5)
+#define IEEE80211_ASSOC_TIMEOUT_LONG	(HZ / 2)
 #define IEEE80211_ASSOC_TIMEOUT_SHORT	(HZ / 10)
 #define IEEE80211_ASSOC_MAX_TRIES	3
 
@@ -209,8 +211,9 @@ ieee80211_determine_chantype(struct ieee
 			     struct ieee80211_channel *channel,
 			     const struct ieee80211_ht_operation *ht_oper,
 			     const struct ieee80211_vht_operation *vht_oper,
-			     struct cfg80211_chan_def *chandef, bool verbose)
+			     struct cfg80211_chan_def *chandef, bool tracking)
 {
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	struct cfg80211_chan_def vht_chandef;
 	u32 ht_cfreq, ret;
 
@@ -229,7 +232,7 @@ ieee80211_determine_chantype(struct ieee
 	ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 						  channel->band);
 	/* check that channel matches the right operating channel */
-	if (channel->center_freq != ht_cfreq) {
+	if (!tracking && channel->center_freq != ht_cfreq) {
 		/*
 		 * It's possible that some APs are confused here;
 		 * Netgear WNDR3700 sometimes reports 4 higher than
@@ -237,11 +240,10 @@ ieee80211_determine_chantype(struct ieee
 		 * since we look at probe response/beacon data here
 		 * it should be OK.
 		 */
-		if (verbose)
-			sdata_info(sdata,
-				   "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
-				   channel->center_freq, ht_cfreq,
-				   ht_oper->primary_chan, channel->band);
+		sdata_info(sdata,
+			   "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
+			   channel->center_freq, ht_cfreq,
+			   ht_oper->primary_chan, channel->band);
 		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 		goto out;
 	}
@@ -295,7 +297,7 @@ ieee80211_determine_chantype(struct ieee
 				channel->band);
 		break;
 	default:
-		if (verbose)
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 			sdata_info(sdata,
 				   "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 				   vht_oper->chan_width);
@@ -304,7 +306,7 @@ ieee80211_determine_chantype(struct ieee
 	}
 
 	if (!cfg80211_chandef_valid(&vht_chandef)) {
-		if (verbose)
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 			sdata_info(sdata,
 				   "AP VHT information is invalid, disable VHT\n");
 		ret = IEEE80211_STA_DISABLE_VHT;
@@ -317,7 +319,7 @@ ieee80211_determine_chantype(struct ieee
 	}
 
 	if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
-		if (verbose)
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 			sdata_info(sdata,
 				   "AP VHT information doesn't match HT, disable VHT\n");
 		ret = IEEE80211_STA_DISABLE_VHT;
@@ -333,18 +335,27 @@ out:
 	if (ret & IEEE80211_STA_DISABLE_VHT)
 		vht_chandef = *chandef;
 
+	/*
+	 * Ignore the DISABLED flag when we're already connected and only
+	 * tracking the APs beacon for bandwidth changes - otherwise we
+	 * might get disconnected here if we connect to an AP, update our
+	 * regulatory information based on the AP's country IE and the
+	 * information we have is wrong/outdated and disables the channel
+	 * that we're actually using for the connection to the AP.
+	 */
 	while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
-					IEEE80211_CHAN_DISABLED)) {
+					tracking ? 0 :
+						   IEEE80211_CHAN_DISABLED)) {
 		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 			ret = IEEE80211_STA_DISABLE_HT |
 			      IEEE80211_STA_DISABLE_VHT;
-			goto out;
+			break;
 		}
 
 		ret |= chandef_downgrade(chandef);
 	}
 
-	if (chandef->width != vht_chandef.width && verbose)
+	if (chandef->width != vht_chandef.width && !tracking)
 		sdata_info(sdata,
 			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 
@@ -384,7 +395,7 @@ static int ieee80211_config_bw(struct ie
 
 	/* calculate new channel (type) based on HT/VHT operation IEs */
 	flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
-					     vht_oper, &chandef, false);
+					     vht_oper, &chandef, true);
 
 	/*
 	 * Downgrade the new channel if we associated with restricted
@@ -1043,6 +1054,13 @@ ieee80211_sta_process_chanswitch(struct 
 		if (!ieee80211_operating_class_to_band(
 				elems->ext_chansw_ie->new_operating_class,
 				&new_band)) {
+			/*
+			 * Some APs send invalid ECSA IEs in probe response
+			 * frames, so check for these and ignore them.
+			 */
+			if (beacon && elems->ext_chansw_ie->new_ch_num == 0 &&
+			    elems->ext_chansw_ie->new_operating_class == 0)
+				return;
 			sdata_info(sdata,
 				   "cannot understand ECSA IE operating class %d, disconnecting\n",
 				   elems->ext_chansw_ie->new_operating_class);
@@ -1110,6 +1128,15 @@ ieee80211_sta_process_chanswitch(struct 
 	case -1:
 		cfg80211_chandef_create(&new_chandef, new_chan,
 					NL80211_CHAN_NO_HT);
+		/* keep width for 5/10 MHz channels */
+		switch (sdata->vif.bss_conf.chandef.width) {
+		case NL80211_CHAN_WIDTH_5:
+		case NL80211_CHAN_WIDTH_10:
+			new_chandef.width = sdata->vif.bss_conf.chandef.width;
+			break;
+		default:
+			break;
+		}
 		break;
 	}
 
@@ -3394,10 +3421,13 @@ static int ieee80211_probe_auth(struct i
 
 	if (tx_flags == 0) {
 		auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
-		ifmgd->auth_data->timeout_started = true;
+		auth_data->timeout_started = true;
 		run_again(sdata, auth_data->timeout);
 	} else {
-		auth_data->timeout_started = false;
+		auth_data->timeout =
+			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
+		auth_data->timeout_started = true;
+		run_again(sdata, auth_data->timeout);
 	}
 
 	return 0;
@@ -3434,7 +3464,11 @@ static int ieee80211_do_assoc(struct iee
 		assoc_data->timeout_started = true;
 		run_again(sdata, assoc_data->timeout);
 	} else {
-		assoc_data->timeout_started = false;
+		assoc_data->timeout =
+			round_jiffies_up(jiffies +
+					 IEEE80211_ASSOC_TIMEOUT_LONG);
+		assoc_data->timeout_started = true;
+		run_again(sdata, assoc_data->timeout);
 	}
 
 	return 0;
@@ -3829,7 +3863,7 @@ static int ieee80211_prep_channel(struct
 	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
 						     cbss->channel,
 						     ht_oper, vht_oper,
-						     &chandef, true);
+						     &chandef, false);
 
 	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
 				      local->rx_chains);
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -772,6 +772,7 @@ void cfg80211_leave(struct cfg80211_regi
 		cfg80211_leave_mesh(rdev, dev);
 		break;
 	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_P2P_GO:
 		cfg80211_stop_ap(rdev, dev);
 		break;
 	default:
--- a/drivers/net/wireless/rtlwifi/Kconfig
+++ b/drivers/net/wireless/rtlwifi/Kconfig
@@ -1,29 +1,22 @@
-config RTLWIFI
-	tristate "Realtek wireless card support"
+menuconfig RTL_CARDS
+	tristate "Realtek rtlwifi family of devices"
 	depends on m
-	depends on MAC80211
-	select BACKPORT_FW_LOADER
-	---help---
-	  This is common code for RTL8192CE/RTL8192CU/RTL8192SE/RTL8723AE
-	  drivers.  This module does nothing by itself - the various front-end
-	  drivers need to be enabled to support any desired devices.
-
-	  If you choose to build as a module, it'll be called rtlwifi.
-
-config RTLWIFI_DEBUG
-	bool "Debugging output for rtlwifi driver family"
-	depends on RTLWIFI
+	depends on MAC80211 && (PCI || USB)
 	default y
 	---help---
-	To use the module option that sets the dynamic-debugging level for,
-	the front-end driver, this parameter must be "Y". For memory-limited
-	systems, choose "N". If in doubt, choose "Y".
+	  This option will enable support for the Realtek mac80211-based
+	  wireless drivers. Drivers rtl8192ce, rtl8192cu, rtl8192se, rtl8192de,
+	  rtl8723eu, and rtl8188eu share some common code.
+
+if RTL_CARDS
 
 config RTL8192CE
 	tristate "Realtek RTL8192CE/RTL8188CE Wireless Network Adapter"
 	depends on m
-	depends on RTLWIFI && PCI
+	depends on PCI
 	select RTL8192C_COMMON
+	select RTLWIFI
+	select RTLWIFI_PCI
 	---help---
 	This is the driver for Realtek RTL8192CE/RTL8188CE 802.11n PCIe
 	wireless network adapters.
@@ -33,7 +26,9 @@ config RTL8192CE
 config RTL8192SE
 	tristate "Realtek RTL8192SE/RTL8191SE PCIe Wireless Network Adapter"
 	depends on m
-	depends on RTLWIFI && PCI
+	depends on PCI
+	select RTLWIFI
+	select RTLWIFI_PCI
 	---help---
 	This is the driver for Realtek RTL8192SE/RTL8191SE 802.11n PCIe
 	wireless network adapters.
@@ -43,7 +38,9 @@ config RTL8192SE
 config RTL8192DE
 	tristate "Realtek RTL8192DE/RTL8188DE PCIe Wireless Network Adapter"
 	depends on m
-	depends on RTLWIFI && PCI
+	depends on PCI
+	select RTLWIFI
+	select RTLWIFI_PCI
 	---help---
 	This is the driver for Realtek RTL8192DE/RTL8188DE 802.11n PCIe
 	wireless network adapters.
@@ -53,7 +50,9 @@ config RTL8192DE
 config RTL8723AE
 	tristate "Realtek RTL8723AE PCIe Wireless Network Adapter"
 	depends on m
-	depends on RTLWIFI && PCI
+	depends on PCI
+	select RTLWIFI
+	select RTLWIFI_PCI
 	---help---
 	This is the driver for Realtek RTL8723AE 802.11n PCIe
 	wireless network adapters.
@@ -63,7 +62,9 @@ config RTL8723AE
 config RTL8188EE
 	tristate "Realtek RTL8188EE Wireless Network Adapter"
 	depends on m
-	depends on RTLWIFI && PCI
+	depends on PCI
+	select RTLWIFI
+	select RTLWIFI_PCI
 	---help---
 	This is the driver for Realtek RTL8188EE 802.11n PCIe
 	wireless network adapters.
@@ -73,7 +74,9 @@ config RTL8188EE
 config RTL8192CU
 	tristate "Realtek RTL8192CU/RTL8188CU USB Wireless Network Adapter"
 	depends on m
-	depends on RTLWIFI && USB
+	depends on USB
+	select RTLWIFI
+	select RTLWIFI_USB
 	select RTL8192C_COMMON
 	---help---
 	This is the driver for Realtek RTL8192CU/RTL8188CU 802.11n USB
@@ -81,8 +84,32 @@ config RTL8192CU
 
 	If you choose to build it as a module, it will be called rtl8192cu
 
+config RTLWIFI
+	tristate
+	depends on m
+	select BACKPORT_FW_LOADER
+
+config RTLWIFI_PCI
+	tristate
+	depends on m
+
+config RTLWIFI_USB
+	tristate
+	depends on m
+
+config RTLWIFI_DEBUG
+	bool "Debugging output for rtlwifi driver family"
+	depends on RTLWIFI
+	default y
+	---help---
+	To use the module option that sets the dynamic-debugging level for,
+	the front-end driver, this parameter must be "Y". For memory-limited
+	systems, choose "N". If in doubt, choose "Y".
+
 config RTL8192C_COMMON
 	tristate
 	depends on m
 	depends on RTL8192CE || RTL8192CU
-	default m
+	default y
+
+endif
--- a/drivers/net/wireless/rtlwifi/Makefile
+++ b/drivers/net/wireless/rtlwifi/Makefile
@@ -12,13 +12,11 @@ rtlwifi-objs	:=		\
 
 rtl8192c_common-objs +=		\
 
-ifneq ($(CONFIG_PCI),)
-rtlwifi-objs	+= pci.o
-endif
+obj-$(CPTCFG_RTLWIFI_PCI)	+= rtl_pci.o
+rtl_pci-objs	:=		pci.o
 
-ifneq ($(CONFIG_USB),)
-rtlwifi-objs	+= usb.o
-endif
+obj-$(CPTCFG_RTLWIFI_USB)	+= rtl_usb.o
+rtl_usb-objs	:=		usb.o
 
 obj-$(CPTCFG_RTL8192C_COMMON)	+= rtl8192c/
 obj-$(CPTCFG_RTL8192CE)		+= rtl8192ce/
--- a/drivers/net/wireless/rtlwifi/ps.h
+++ b/drivers/net/wireless/rtlwifi/ps.h
@@ -49,5 +49,6 @@ void rtl_swlps_rf_awake(struct ieee80211
 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw);
 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw, u8 p2p_ps_state);
 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len);
+void rtl_lps_change_work_callback(struct work_struct *work);
 
 #endif
--- a/drivers/net/wireless/rtlwifi/base.c
+++ b/drivers/net/wireless/rtlwifi/base.c
@@ -173,6 +173,7 @@ u8 rtl_tid_to_ac(u8 tid)
 {
 	return tid_to_ac[tid];
 }
+EXPORT_SYMBOL_GPL(rtl_tid_to_ac);
 
 static void _rtl_init_hw_ht_capab(struct ieee80211_hw *hw,
 				  struct ieee80211_sta_ht_cap *ht_cap)
@@ -407,6 +408,7 @@ void rtl_deinit_deferred_work(struct iee
 	cancel_delayed_work(&rtlpriv->works.ps_rfon_wq);
 	cancel_delayed_work(&rtlpriv->works.fwevt_wq);
 }
+EXPORT_SYMBOL_GPL(rtl_deinit_deferred_work);
 
 void rtl_init_rfkill(struct ieee80211_hw *hw)
 {
@@ -440,6 +442,7 @@ void rtl_deinit_rfkill(struct ieee80211_
 {
 	wiphy_rfkill_stop_polling(hw->wiphy);
 }
+EXPORT_SYMBOL_GPL(rtl_deinit_rfkill);
 
 int rtl_init_core(struct ieee80211_hw *hw)
 {
@@ -490,10 +493,12 @@ int rtl_init_core(struct ieee80211_hw *h
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rtl_init_core);
 
 void rtl_deinit_core(struct ieee80211_hw *hw)
 {
 }
+EXPORT_SYMBOL_GPL(rtl_deinit_core);
 
 void rtl_init_rx_config(struct ieee80211_hw *hw)
 {
@@ -502,6 +507,7 @@ void rtl_init_rx_config(struct ieee80211
 
 	rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
 }
+EXPORT_SYMBOL_GPL(rtl_init_rx_config);
 
 /*********************************************************
  *
@@ -880,6 +886,7 @@ bool rtl_tx_mgmt_proc(struct ieee80211_h
 
 	return true;
 }
+EXPORT_SYMBOL_GPL(rtl_tx_mgmt_proc);
 
 void rtl_get_tcb_desc(struct ieee80211_hw *hw,
 		      struct ieee80211_tx_info *info,
@@ -1053,6 +1060,7 @@ bool rtl_action_proc(struct ieee80211_hw
 
 	return true;
 }
+EXPORT_SYMBOL_GPL(rtl_action_proc);
 
 /*should call before software enc*/
 u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
@@ -1126,6 +1134,7 @@ u8 rtl_is_special_data(struct ieee80211_
 
 	return false;
 }
+EXPORT_SYMBOL_GPL(rtl_is_special_data);
 
 /*********************************************************
  *
@@ -1301,6 +1310,7 @@ void rtl_beacon_statistic(struct ieee802
 
 	rtlpriv->link_info.bcn_rx_inperiod++;
 }
+EXPORT_SYMBOL_GPL(rtl_beacon_statistic);
 
 void rtl_watchdog_wq_callback(void *data)
 {
@@ -1794,6 +1804,7 @@ void rtl_recognize_peer(struct ieee80211
 
 	mac->vendor = vendor;
 }
+EXPORT_SYMBOL_GPL(rtl_recognize_peer);
 
 /*********************************************************
  *
@@ -1850,6 +1861,7 @@ struct attribute_group rtl_attribute_gro
 	.name = "rtlsysfs",
 	.attrs = rtl_sysfs_entries,
 };
+EXPORT_SYMBOL_GPL(rtl_attribute_group);
 
 MODULE_AUTHOR("lizhaoming	<chaoming_li@realsil.com.cn>");
 MODULE_AUTHOR("Realtek WlanFAE	<wlanfae@realtek.com>");
@@ -1857,7 +1869,8 @@ MODULE_AUTHOR("Larry Finger	<Larry.FInge
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");
 
-struct rtl_global_var global_var = {};
+struct rtl_global_var rtl_global_var = {};
+EXPORT_SYMBOL_GPL(rtl_global_var);
 
 static int __init rtl_core_module_init(void)
 {
@@ -1865,8 +1878,8 @@ static int __init rtl_core_module_init(v
 		pr_err("Unable to register rtl_rc, use default RC !!\n");
 
 	/* init some global vars */
-	INIT_LIST_HEAD(&global_var.glb_priv_list);
-	spin_lock_init(&global_var.glb_list_lock);
+	INIT_LIST_HEAD(&rtl_global_var.glb_priv_list);
+	spin_lock_init(&rtl_global_var.glb_list_lock);
 
 	return 0;
 }
--- a/drivers/net/wireless/rtlwifi/base.h
+++ b/drivers/net/wireless/rtlwifi/base.h
@@ -147,7 +147,7 @@ void rtl_recognize_peer(struct ieee80211
 u8 rtl_tid_to_ac(u8 tid);
 extern struct attribute_group rtl_attribute_group;
 void rtl_easy_concurrent_retrytimer_callback(unsigned long data);
-extern struct rtl_global_var global_var;
+extern struct rtl_global_var rtl_global_var;
 int rtlwifi_rate_mapping(struct ieee80211_hw *hw,
 			 bool isht, u8 desc_rate, bool first_ampdu);
 bool rtl_tx_mgmt_proc(struct ieee80211_hw *hw, struct sk_buff *skb);
--- a/drivers/net/wireless/rtlwifi/core.c
+++ b/drivers/net/wireless/rtlwifi/core.c
@@ -1330,3 +1330,4 @@ const struct ieee80211_ops rtl_ops = {
 	.rfkill_poll = rtl_op_rfkill_poll,
 	.flush = rtl_op_flush,
 };
+EXPORT_SYMBOL_GPL(rtl_ops);
--- a/drivers/net/wireless/rtlwifi/debug.c
+++ b/drivers/net/wireless/rtlwifi/debug.c
@@ -51,3 +51,4 @@ void rtl_dbgp_flag_init(struct ieee80211
 
 	/*Init Debug flag enable condition */
 }
+EXPORT_SYMBOL_GPL(rtl_dbgp_flag_init);
--- a/drivers/net/wireless/rtlwifi/efuse.c
+++ b/drivers/net/wireless/rtlwifi/efuse.c
@@ -229,6 +229,7 @@ void read_efuse_byte(struct ieee80211_hw
 
 	*pbuf = (u8) (value32 & 0xff);
 }
+EXPORT_SYMBOL_GPL(read_efuse_byte);
 
 void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
 {
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -35,6 +35,13 @@
 #include "efuse.h"
 #include <linux/export.h>
 #include <linux/kmemleak.h>
+#include <linux/module.h>
+
+MODULE_AUTHOR("lizhaoming	<chaoming_li@realsil.com.cn>");
+MODULE_AUTHOR("Realtek WlanFAE	<wlanfae@realtek.com>");
+MODULE_AUTHOR("Larry Finger	<Larry.FInger@lwfinger.net>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PCI basic driver for rtlwifi");
 
 static const u16 pcibridge_vendors[PCI_BRIDGE_VENDOR_MAX] = {
 	PCI_VENDOR_ID_INTEL,
@@ -1008,19 +1015,6 @@ static void _rtl_pci_prepare_bcn_tasklet
 	return;
 }
 
-static void rtl_lps_change_work_callback(struct work_struct *work)
-{
-	struct rtl_works *rtlworks =
-	    container_of(work, struct rtl_works, lps_change_work);
-	struct ieee80211_hw *hw = rtlworks->hw;
-	struct rtl_priv *rtlpriv = rtl_priv(hw);
-
-	if (rtlpriv->enter_ps)
-		rtl_lps_enter(hw);
-	else
-		rtl_lps_leave(hw);
-}
-
 static void _rtl_pci_init_trx_var(struct ieee80211_hw *hw)
 {
 	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
@@ -1899,7 +1893,7 @@ int rtl_pci_probe(struct pci_dev *pdev,
 	rtlpriv->rtlhal.interface = INTF_PCI;
 	rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_data);
 	rtlpriv->intf_ops = &rtl_pci_ops;
-	rtlpriv->glb_var = &global_var;
+	rtlpriv->glb_var = &rtl_global_var;
 
 	/*
 	 *init dbgp flags before all
--- a/drivers/net/wireless/rtlwifi/ps.c
+++ b/drivers/net/wireless/rtlwifi/ps.c
@@ -269,6 +269,7 @@ void rtl_ips_nic_on(struct ieee80211_hw 
 
 	spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
 }
+EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
 
 /*for FW LPS*/
 
@@ -518,6 +519,7 @@ void rtl_swlps_beacon(struct ieee80211_h
 			 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
 	}
 }
+EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
 
 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
 {
@@ -611,6 +613,19 @@ void rtl_swlps_rf_sleep(struct ieee80211
 			MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
 }
 
+void rtl_lps_change_work_callback(struct work_struct *work)
+{
+	struct rtl_works *rtlworks =
+	    container_of(work, struct rtl_works, lps_change_work);
+	struct ieee80211_hw *hw = rtlworks->hw;
+	struct rtl_priv *rtlpriv = rtl_priv(hw);
+
+	if (rtlpriv->enter_ps)
+		rtl_lps_enter(hw);
+	else
+		rtl_lps_leave(hw);
+}
+EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
 
 void rtl_swlps_wq_callback(void *data)
 {
@@ -922,3 +937,4 @@ void rtl_p2p_info(struct ieee80211_hw *h
 	else
 		rtl_p2p_noa_ie(hw, data, len - FCS_LEN);
 }
+EXPORT_SYMBOL_GPL(rtl_p2p_info);
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -32,6 +32,13 @@
 #include "ps.h"
 #include "rtl8192c/fw_common.h"
 #include <linux/export.h>
+#include <linux/module.h>
+
+MODULE_AUTHOR("lizhaoming	<chaoming_li@realsil.com.cn>");
+MODULE_AUTHOR("Realtek WlanFAE	<wlanfae@realtek.com>");
+MODULE_AUTHOR("Larry Finger	<Larry.FInger@lwfinger.net>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("USB basic driver for rtlwifi");
 
 #define	REALTEK_USB_VENQT_READ			0xC0
 #define	REALTEK_USB_VENQT_WRITE			0x40
@@ -1070,6 +1077,8 @@ int rtl_usb_probe(struct usb_interface *
 	spin_lock_init(&rtlpriv->locks.usb_lock);
 	INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
 		  rtl_fill_h2c_cmd_work_callback);
+	INIT_WORK(&rtlpriv->works.lps_change_work,
+		  rtl_lps_change_work_callback);
 
 	rtlpriv->usb_data_index = 0;
 	init_completion(&rtlpriv->firmware_loading_complete);
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -72,17 +72,12 @@ struct ath_config {
 /*************************/
 
 #define ATH_TXBUF_RESET(_bf) do {				\
-		(_bf)->bf_stale = false;			\
 		(_bf)->bf_lastbf = NULL;			\
 		(_bf)->bf_next = NULL;				\
 		memset(&((_bf)->bf_state), 0,			\
 		       sizeof(struct ath_buf_state));		\
 	} while (0)
 
-#define ATH_RXBUF_RESET(_bf) do {		\
-		(_bf)->bf_stale = false;	\
-	} while (0)
-
 /**
  * enum buffer_type - Buffer type flags
  *
@@ -137,7 +132,8 @@ int ath_descdma_setup(struct ath_softc *
 #define ATH_AGGR_ENCRYPTDELIM      10
 /* minimum h/w qdepth to be sustained to maximize aggregation */
 #define ATH_AGGR_MIN_QDEPTH        2
-#define ATH_AMPDU_SUBFRAME_DEFAULT 32
+/* minimum h/w qdepth for non-aggregated traffic */
+#define ATH_NON_AGGR_MIN_QDEPTH    8
 
 #define IEEE80211_SEQ_SEQ_SHIFT    4
 #define IEEE80211_SEQ_MAX          4096
@@ -174,12 +170,6 @@ int ath_descdma_setup(struct ath_softc *
 
 #define ATH_TX_COMPLETE_POLL_INT	1000
 
-enum ATH_AGGR_STATUS {
-	ATH_AGGR_DONE,
-	ATH_AGGR_BAW_CLOSED,
-	ATH_AGGR_LIMITED,
-};
-
 #define ATH_TXFIFO_DEPTH 8
 struct ath_txq {
 	int mac80211_qnum; /* mac80211 queue number, -1 means not mac80211 Q */
@@ -201,10 +191,10 @@ struct ath_txq {
 
 struct ath_atx_ac {
 	struct ath_txq *txq;
-	int sched;
 	struct list_head list;
 	struct list_head tid_q;
 	bool clear_ps_filter;
+	bool sched;
 };
 
 struct ath_frame_info {
@@ -212,14 +202,16 @@ struct ath_frame_info {
 	int framelen;
 	enum ath9k_key_type keytype;
 	u8 keyix;
-	u8 retries;
 	u8 rtscts_rate;
+	u8 retries : 7;
+	u8 baw_tracked : 1;
 };
 
 struct ath_buf_state {
 	u8 bf_type;
 	u8 bfs_paprd;
 	u8 ndelim;
+	bool stale;
 	u16 seqno;
 	unsigned long bfs_paprd_timestamp;
 };
@@ -233,7 +225,6 @@ struct ath_buf {
 	void *bf_desc;			/* virtual addr of desc */
 	dma_addr_t bf_daddr;		/* physical addr of desc */
 	dma_addr_t bf_buf_addr;	/* physical addr of data buffer, for DMA */
-	bool bf_stale;
 	struct ieee80211_tx_rate rates[4];
 	struct ath_buf_state bf_state;
 };
@@ -241,16 +232,18 @@ struct ath_buf {
 struct ath_atx_tid {
 	struct list_head list;
 	struct sk_buff_head buf_q;
+	struct sk_buff_head retry_q;
 	struct ath_node *an;
 	struct ath_atx_ac *ac;
 	unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
-	int bar_index;
 	u16 seq_start;
 	u16 seq_next;
 	u16 baw_size;
-	int tidno;
+	u8 tidno;
 	int baw_head;   /* first un-acked tx buffer */
 	int baw_tail;   /* next unused tx buffer slot */
+
+	s8 bar_index;
 	bool sched;
 	bool paused;
 	bool active;
@@ -262,12 +255,13 @@ struct ath_node {
 	struct ieee80211_vif *vif; /* interface with which we're associated */
 	struct ath_atx_tid tid[IEEE80211_NUM_TIDS];
 	struct ath_atx_ac ac[IEEE80211_NUM_ACS];
-	int ps_key;
 
 	u16 maxampdu;
 	u8 mpdudensity;
+	s8 ps_key;
 
 	bool sleeping;
+	bool no_ps_filter;
 
 #if defined(CPTCFG_MAC80211_DEBUGFS) && defined(CPTCFG_ATH9K_DEBUGFS)
 	struct dentry *node_stat;
@@ -317,6 +311,7 @@ struct ath_rx {
 	struct ath_descdma rxdma;
 	struct ath_rx_edma rx_edma[ATH9K_RX_QUEUE_MAX];
 
+	struct ath_buf *buf_hold;
 	struct sk_buff *frag;
 
 	u32 ampdu_ref;
@@ -367,6 +362,7 @@ void ath9k_release_buffered_frames(struc
 /********/
 
 struct ath_vif {
+	struct ath_node mcast_node;
 	int av_bslot;
 	bool primary_sta_vif;
 	__le64 tsf_adjust; /* TSF adjustment for staggered beacons */
@@ -585,19 +581,14 @@ static inline void ath_fill_led_pin(stru
 #define ATH_ANT_DIV_COMB_MAX_COUNT 100
 #define ATH_ANT_DIV_COMB_ALT_ANT_RATIO 30
 #define ATH_ANT_DIV_COMB_ALT_ANT_RATIO2 20
+#define ATH_ANT_DIV_COMB_ALT_ANT_RATIO_LOW_RSSI 50
+#define ATH_ANT_DIV_COMB_ALT_ANT_RATIO2_LOW_RSSI 50
 
 #define ATH_ANT_DIV_COMB_LNA1_LNA2_SWITCH_DELTA -1
 #define ATH_ANT_DIV_COMB_LNA1_DELTA_HI -4
 #define ATH_ANT_DIV_COMB_LNA1_DELTA_MID -2
 #define ATH_ANT_DIV_COMB_LNA1_DELTA_LOW 2
 
-enum ath9k_ant_div_comb_lna_conf {
-	ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2,
-	ATH_ANT_DIV_COMB_LNA2,
-	ATH_ANT_DIV_COMB_LNA1,
-	ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2,
-};
-
 struct ath_ant_comb {
 	u16 count;
 	u16 total_pkt_count;
@@ -614,27 +605,36 @@ struct ath_ant_comb {
 	int rssi_first;
 	int rssi_second;
 	int rssi_third;
+	int ant_ratio;
+	int ant_ratio2;
 	bool alt_good;
 	int quick_scan_cnt;
-	int main_conf;
+	enum ath9k_ant_div_comb_lna_conf main_conf;
 	enum ath9k_ant_div_comb_lna_conf first_quick_scan_conf;
 	enum ath9k_ant_div_comb_lna_conf second_quick_scan_conf;
 	bool first_ratio;
 	bool second_ratio;
 	unsigned long scan_start_time;
+
+	/*
+	 * Card-specific config values.
+	 */
+	int low_rssi_thresh;
+	int fast_div_bias;
 };
 
 void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs);
-void ath_ant_comb_update(struct ath_softc *sc);
 
 /********************/
 /* Main driver core */
 /********************/
 
-#define ATH9K_PCI_CUS198 0x0001
-#define ATH9K_PCI_CUS230 0x0002
-#define ATH9K_PCI_CUS217 0x0004
-#define ATH9K_PCI_WOW    0x0008
+#define ATH9K_PCI_CUS198     0x0001
+#define ATH9K_PCI_CUS230     0x0002
+#define ATH9K_PCI_CUS217     0x0004
+#define ATH9K_PCI_WOW        0x0008
+#define ATH9K_PCI_BT_ANT_DIV 0x0010
+#define ATH9K_PCI_D3_L1_WAR  0x0020
 
 /*
  * Default cache line size, in bytes.
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -270,25 +270,29 @@ static const struct file_operations fops
 	.llseek = default_llseek,
 };
 
-static ssize_t read_file_ant_diversity(struct file *file, char __user *user_buf,
-				       size_t count, loff_t *ppos)
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+
+static ssize_t read_file_bt_ant_diversity(struct file *file,
+					  char __user *user_buf,
+					  size_t count, loff_t *ppos)
 {
 	struct ath_softc *sc = file->private_data;
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	char buf[32];
 	unsigned int len;
 
-	len = sprintf(buf, "%d\n", common->antenna_diversity);
+	len = sprintf(buf, "%d\n", common->bt_ant_diversity);
 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 }
 
-static ssize_t write_file_ant_diversity(struct file *file,
-					const char __user *user_buf,
-					size_t count, loff_t *ppos)
+static ssize_t write_file_bt_ant_diversity(struct file *file,
+					   const char __user *user_buf,
+					   size_t count, loff_t *ppos)
 {
 	struct ath_softc *sc = file->private_data;
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-	unsigned long antenna_diversity;
+	struct ath9k_hw_capabilities *pCap = &sc->sc_ah->caps;
+	unsigned long bt_ant_diversity;
 	char buf[32];
 	ssize_t len;
 
@@ -296,26 +300,147 @@ static ssize_t write_file_ant_diversity(
 	if (copy_from_user(buf, user_buf, len))
 		return -EFAULT;
 
-	if (!AR_SREV_9565(sc->sc_ah))
+	if (!(pCap->hw_caps & ATH9K_HW_CAP_BT_ANT_DIV))
 		goto exit;
 
 	buf[len] = '\0';
-	if (strict_strtoul(buf, 0, &antenna_diversity))
+	if (kstrtoul(buf, 0, &bt_ant_diversity))
 		return -EINVAL;
 
-	common->antenna_diversity = !!antenna_diversity;
+	common->bt_ant_diversity = !!bt_ant_diversity;
 	ath9k_ps_wakeup(sc);
-	ath_ant_comb_update(sc);
-	ath_dbg(common, CONFIG, "Antenna diversity: %d\n",
-		common->antenna_diversity);
+	ath9k_hw_set_bt_ant_diversity(sc->sc_ah, common->bt_ant_diversity);
+	ath_dbg(common, CONFIG, "Enable WLAN/BT RX Antenna diversity: %d\n",
+		common->bt_ant_diversity);
 	ath9k_ps_restore(sc);
 exit:
 	return count;
 }
 
-static const struct file_operations fops_ant_diversity = {
-	.read = read_file_ant_diversity,
-	.write = write_file_ant_diversity,
+static const struct file_operations fops_bt_ant_diversity = {
+	.read = read_file_bt_ant_diversity,
+	.write = write_file_bt_ant_diversity,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
+#endif
+
+void ath9k_debug_stat_ant(struct ath_softc *sc,
+			  struct ath_hw_antcomb_conf *div_ant_conf,
+			  int main_rssi_avg, int alt_rssi_avg)
+{
+	struct ath_antenna_stats *as_main = &sc->debug.stats.ant_stats[ANT_MAIN];
+	struct ath_antenna_stats *as_alt = &sc->debug.stats.ant_stats[ANT_ALT];
+
+	as_main->lna_attempt_cnt[div_ant_conf->main_lna_conf]++;
+	as_alt->lna_attempt_cnt[div_ant_conf->alt_lna_conf]++;
+
+	as_main->rssi_avg = main_rssi_avg;
+	as_alt->rssi_avg = alt_rssi_avg;
+}
+
+static ssize_t read_file_antenna_diversity(struct file *file,
+					   char __user *user_buf,
+					   size_t count, loff_t *ppos)
+{
+	struct ath_softc *sc = file->private_data;
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath9k_hw_capabilities *pCap = &ah->caps;
+	struct ath_antenna_stats *as_main = &sc->debug.stats.ant_stats[ANT_MAIN];
+	struct ath_antenna_stats *as_alt = &sc->debug.stats.ant_stats[ANT_ALT];
+	struct ath_hw_antcomb_conf div_ant_conf;
+	unsigned int len = 0, size = 1024;
+	ssize_t retval = 0;
+	char *buf;
+	char *lna_conf_str[4] = {"LNA1_MINUS_LNA2",
+				 "LNA2",
+				 "LNA1",
+				 "LNA1_PLUS_LNA2"};
+
+	buf = kzalloc(size, GFP_KERNEL);
+	if (buf == NULL)
+		return -ENOMEM;
+
+	if (!(pCap->hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB)) {
+		len += snprintf(buf + len, size - len, "%s\n",
+				"Antenna Diversity Combining is disabled");
+		goto exit;
+	}
+
+	ath9k_ps_wakeup(sc);
+	ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
+	len += snprintf(buf + len, size - len, "Current MAIN config : %s\n",
+			lna_conf_str[div_ant_conf.main_lna_conf]);
+	len += snprintf(buf + len, size - len, "Current ALT config  : %s\n",
+			lna_conf_str[div_ant_conf.alt_lna_conf]);
+	len += snprintf(buf + len, size - len, "Average MAIN RSSI   : %d\n",
+			as_main->rssi_avg);
+	len += snprintf(buf + len, size - len, "Average ALT RSSI    : %d\n\n",
+			as_alt->rssi_avg);
+	ath9k_ps_restore(sc);
+
+	len += snprintf(buf + len, size - len, "Packet Receive Cnt:\n");
+	len += snprintf(buf + len, size - len, "-------------------\n");
+
+	len += snprintf(buf + len, size - len, "%30s%15s\n",
+			"MAIN", "ALT");
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"TOTAL COUNT",
+			as_main->recv_cnt,
+			as_alt->recv_cnt);
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA1",
+			as_main->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA1],
+			as_alt->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA1]);
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA2",
+			as_main->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA2],
+			as_alt->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA2]);
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA1 + LNA2",
+			as_main->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2],
+			as_alt->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2]);
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA1 - LNA2",
+			as_main->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2],
+			as_alt->lna_recv_cnt[ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2]);
+
+	len += snprintf(buf + len, size - len, "\nLNA Config Attempts:\n");
+	len += snprintf(buf + len, size - len, "--------------------\n");
+
+	len += snprintf(buf + len, size - len, "%30s%15s\n",
+			"MAIN", "ALT");
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA1",
+			as_main->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA1],
+			as_alt->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA1]);
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA2",
+			as_main->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA2],
+			as_alt->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA2]);
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA1 + LNA2",
+			as_main->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2],
+			as_alt->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2]);
+	len += snprintf(buf + len, size - len, "%-14s:%15d%15d\n",
+			"LNA1 - LNA2",
+			as_main->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2],
+			as_alt->lna_attempt_cnt[ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2]);
+
+exit:
+	if (len > size)
+		len = size;
+
+	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+	kfree(buf);
+
+	return retval;
+}
+
+static const struct file_operations fops_antenna_diversity = {
+	.read = read_file_antenna_diversity,
 	.open = simple_open,
 	.owner = THIS_MODULE,
 	.llseek = default_llseek,
@@ -607,6 +732,28 @@ static ssize_t read_file_xmit(struct fil
 	return retval;
 }
 
+static ssize_t print_queue(struct ath_softc *sc, struct ath_txq *txq,
+			   char *buf, ssize_t size)
+{
+	ssize_t len = 0;
+
+	ath_txq_lock(sc, txq);
+
+	len += snprintf(buf + len, size - len, "%s: %d ",
+			"qnum", txq->axq_qnum);
+	len += snprintf(buf + len, size - len, "%s: %2d ",
+			"qdepth", txq->axq_depth);
+	len += snprintf(buf + len, size - len, "%s: %2d ",
+			"ampdu-depth", txq->axq_ampdu_depth);
+	len += snprintf(buf + len, size - len, "%s: %3d ",
+			"pending", txq->pending_frames);
+	len += snprintf(buf + len, size - len, "%s: %d\n",
+			"stopped", txq->stopped);
+
+	ath_txq_unlock(sc, txq);
+	return len;
+}
+
 static ssize_t read_file_queues(struct file *file, char __user *user_buf,
 				size_t count, loff_t *ppos)
 {
@@ -624,24 +771,13 @@ static ssize_t read_file_queues(struct f
 
 	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 		txq = sc->tx.txq_map[i];
-		len += snprintf(buf + len, size - len, "(%s): ", qname[i]);
-
-		ath_txq_lock(sc, txq);
-
-		len += snprintf(buf + len, size - len, "%s: %d ",
-				"qnum", txq->axq_qnum);
-		len += snprintf(buf + len, size - len, "%s: %2d ",
-				"qdepth", txq->axq_depth);
-		len += snprintf(buf + len, size - len, "%s: %2d ",
-				"ampdu-depth", txq->axq_ampdu_depth);
-		len += snprintf(buf + len, size - len, "%s: %3d ",
-				"pending", txq->pending_frames);
-		len += snprintf(buf + len, size - len, "%s: %d\n",
-				"stopped", txq->stopped);
-
-		ath_txq_unlock(sc, txq);
+		len += snprintf(buf + len, size - len, "(%s):  ", qname[i]);
+		len += print_queue(sc, txq, buf + len, size - len);
 	}
 
+	len += snprintf(buf + len, size - len, "(CAB): ");
+	len += print_queue(sc, sc->beacon.cabq, buf + len, size - len);
+
 	if (len > size)
 		len = size;
 
@@ -1818,9 +1954,11 @@ int ath9k_init_debug(struct ath_hw *ah)
 			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_mask);
 	debugfs_create_u32("gpio_val", S_IRUSR | S_IWUSR,
 			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_val);
-	debugfs_create_file("diversity", S_IRUSR | S_IWUSR,
-			    sc->debug.debugfs_phy, sc, &fops_ant_diversity);
+	debugfs_create_file("antenna_diversity", S_IRUSR,
+			    sc->debug.debugfs_phy, sc, &fops_antenna_diversity);
 #ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+	debugfs_create_file("bt_ant_diversity", S_IRUSR | S_IWUSR,
+			    sc->debug.debugfs_phy, sc, &fops_bt_ant_diversity);
 	debugfs_create_file("btcoex", S_IRUSR, sc->debug.debugfs_phy, sc,
 			    &fops_btcoex);
 #endif
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -30,13 +30,14 @@
 
 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
+#define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ)
 
 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
 
 
 static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 				      const u8 *bssid, const int beacon_int,
-				      struct ieee80211_channel *chan,
+				      struct cfg80211_chan_def *req_chandef,
 				      const u32 basic_rates,
 				      const u16 capability, u64 tsf,
 				      bool creator)
@@ -51,6 +52,7 @@ static void __ieee80211_sta_join_ibss(st
 	u32 bss_change;
 	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 	struct cfg80211_chan_def chandef;
+	struct ieee80211_channel *chan;
 	struct beacon_data *presp;
 	int frame_len;
 
@@ -81,7 +83,9 @@ static void __ieee80211_sta_join_ibss(st
 
 	sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0;
 
-	chandef = ifibss->chandef;
+	/* make a copy of the chandef, it could be modified below. */
+	chandef = *req_chandef;
+	chan = chandef.chan;
 	if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) {
 		chandef.width = NL80211_CHAN_WIDTH_20;
 		chandef.center_freq1 = chan->center_freq;
@@ -259,10 +263,12 @@ static void ieee80211_sta_join_ibss(stru
 	struct cfg80211_bss *cbss =
 		container_of((void *)bss, struct cfg80211_bss, priv);
 	struct ieee80211_supported_band *sband;
+	struct cfg80211_chan_def chandef;
 	u32 basic_rates;
 	int i, j;
 	u16 beacon_int = cbss->beacon_interval;
 	const struct cfg80211_bss_ies *ies;
+	enum nl80211_channel_type chan_type;
 	u64 tsf;
 
 	sdata_assert_lock(sdata);
@@ -270,6 +276,26 @@ static void ieee80211_sta_join_ibss(stru
 	if (beacon_int < 10)
 		beacon_int = 10;
 
+	switch (sdata->u.ibss.chandef.width) {
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_20:
+	case NL80211_CHAN_WIDTH_40:
+		chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef);
+		cfg80211_chandef_create(&chandef, cbss->channel, chan_type);
+		break;
+	case NL80211_CHAN_WIDTH_5:
+	case NL80211_CHAN_WIDTH_10:
+		cfg80211_chandef_create(&chandef, cbss->channel,
+					NL80211_CHAN_WIDTH_20_NOHT);
+		chandef.width = sdata->u.ibss.chandef.width;
+		break;
+	default:
+		/* fall back to 20 MHz for unsupported modes */
+		cfg80211_chandef_create(&chandef, cbss->channel,
+					NL80211_CHAN_WIDTH_20_NOHT);
+		break;
+	}
+
 	sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
 
 	basic_rates = 0;
@@ -294,7 +320,7 @@ static void ieee80211_sta_join_ibss(stru
 
 	__ieee80211_sta_join_ibss(sdata, cbss->bssid,
 				  beacon_int,
-				  cbss->channel,
+				  &chandef,
 				  basic_rates,
 				  cbss->capability,
 				  tsf, false);
@@ -672,6 +698,33 @@ static int ieee80211_sta_active_ibss(str
 	return active;
 }
 
+static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta, *tmp;
+	unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT;
+	unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT;
+
+	mutex_lock(&local->sta_mtx);
+
+	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+		if (sdata != sta->sdata)
+			continue;
+
+		if (time_after(jiffies, sta->last_rx + exp_time) ||
+		    (time_after(jiffies, sta->last_rx + exp_rsn_time) &&
+		     sta->sta_state != IEEE80211_STA_AUTHORIZED)) {
+			sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n",
+				sta->sta_state != IEEE80211_STA_AUTHORIZED ?
+				"not authorized " : "", sta->sta.addr);
+
+			WARN_ON(__sta_info_destroy(sta));
+		}
+	}
+
+	mutex_unlock(&local->sta_mtx);
+}
+
 /*
  * This function is called with state == IEEE80211_IBSS_MLME_JOINED
  */
@@ -685,7 +738,7 @@ static void ieee80211_sta_merge_ibss(str
 	mod_timer(&ifibss->timer,
 		  round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
 
-	ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
+	ieee80211_ibss_sta_expire(sdata);
 
 	if (time_before(jiffies, ifibss->last_scan_completed +
 		       IEEE80211_IBSS_MERGE_INTERVAL))
@@ -736,7 +789,7 @@ static void ieee80211_sta_create_ibss(st
 		sdata->drop_unencrypted = 0;
 
 	__ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
-				  ifibss->chandef.chan, ifibss->basic_rates,
+				  &ifibss->chandef, ifibss->basic_rates,
 				  capability, 0, true);
 }
 
@@ -792,6 +845,17 @@ static void ieee80211_sta_find_ibss(stru
 		return;
 	}
 
+	/* if a fixed bssid and a fixed freq have been provided create the IBSS
+	 * directly and do not waste time scanning
+	 */
+	if (ifibss->fixed_bssid && ifibss->fixed_channel) {
+		sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n",
+			   bssid);
+		ieee80211_sta_create_ibss(sdata);
+		return;
+	}
+
+
 	ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n");
 
 	/* Selected IBSS not found in current scan results - try to scan */
@@ -1138,6 +1202,7 @@ int ieee80211_ibss_leave(struct ieee8021
 	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
 						BSS_CHANGED_IBSS);
+	ieee80211_vif_release_channel(sdata);
 	synchronize_rcu();
 	kfree(presp);
 
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
@@ -632,6 +632,22 @@ static void ar9003_hw_override_ini(struc
 
 	REG_SET_BIT(ah, AR_PHY_CCK_DETECT,
 		    AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV);
+
+	if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
+		REG_WRITE(ah, AR_GLB_SWREG_DISCONT_MODE,
+			  AR_GLB_SWREG_DISCONT_EN_BT_WLAN);
+
+		if (REG_READ_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_0,
+				   AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL))
+			ah->enabled_cals |= TX_IQ_CAL;
+		else
+			ah->enabled_cals &= ~TX_IQ_CAL;
+
+		if (REG_READ(ah, AR_PHY_CL_CAL_CTL) & AR_PHY_CL_CAL_ENABLE)
+			ah->enabled_cals |= TX_CL_CAL;
+		else
+			ah->enabled_cals &= ~TX_CL_CAL;
+	}
 }
 
 static void ar9003_hw_prog_ini(struct ath_hw *ah,
@@ -814,29 +830,12 @@ static int ar9003_hw_process_ini(struct 
 	if (chan->channel == 2484)
 		ar9003_hw_prog_ini(ah, &ah->iniCckfirJapan2484, 1);
 
-	if (AR_SREV_9462(ah) || AR_SREV_9565(ah))
-		REG_WRITE(ah, AR_GLB_SWREG_DISCONT_MODE,
-			  AR_GLB_SWREG_DISCONT_EN_BT_WLAN);
-
 	ah->modes_index = modesIndex;
 	ar9003_hw_override_ini(ah);
 	ar9003_hw_set_channel_regs(ah, chan);
 	ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
 	ath9k_hw_apply_txpower(ah, chan, false);
 
-	if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
-		if (REG_READ_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_0,
-				   AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL))
-			ah->enabled_cals |= TX_IQ_CAL;
-		else
-			ah->enabled_cals &= ~TX_IQ_CAL;
-
-		if (REG_READ(ah, AR_PHY_CL_CAL_CTL) & AR_PHY_CL_CAL_ENABLE)
-			ah->enabled_cals |= TX_CL_CAL;
-		else
-			ah->enabled_cals &= ~TX_CL_CAL;
-	}
-
 	return 0;
 }
 
@@ -1173,6 +1172,10 @@ skip_ws_det:
 		 * is_on == 0 means MRC CCK is OFF (more noise imm)
 		 */
 		bool is_on = param ? 1 : 0;
+
+		if (ah->caps.rx_chainmask == 1)
+			break;
+
 		REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL,
 			      AR_PHY_MRC_CCK_ENABLE, is_on);
 		REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL,
@@ -1413,65 +1416,111 @@ static void ar9003_hw_antdiv_comb_conf_s
 	REG_WRITE(ah, AR_PHY_MC_GAIN_CTRL, regval);
 }
 
-static void ar9003_hw_antctrl_shared_chain_lnadiv(struct ath_hw *ah,
-						  bool enable)
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+
+static void ar9003_hw_set_bt_ant_diversity(struct ath_hw *ah, bool enable)
 {
+	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	u8 ant_div_ctl1;
 	u32 regval;
 
-	if (!AR_SREV_9565(ah))
+	if (!AR_SREV_9485(ah) && !AR_SREV_9565(ah))
 		return;
 
-	ah->shared_chain_lnadiv = enable;
+	if (AR_SREV_9485(ah)) {
+		regval = ar9003_hw_ant_ctrl_common_2_get(ah,
+						 IS_CHAN_2GHZ(ah->curchan));
+		if (enable) {
+			regval &= ~AR_SWITCH_TABLE_COM2_ALL;
+			regval |= ah->config.ant_ctrl_comm2g_switch_enable;
+		}
+		REG_RMW_FIELD(ah, AR_PHY_SWITCH_COM_2,
+			      AR_SWITCH_TABLE_COM2_ALL, regval);
+	}
+
 	ant_div_ctl1 = ah->eep_ops->get_eeprom(ah, EEP_ANT_DIV_CTL1);
 
+	/*
+	 * Set MAIN/ALT LNA conf.
+	 * Set MAIN/ALT gain_tb.
+	 */
 	regval = REG_READ(ah, AR_PHY_MC_GAIN_CTRL);
 	regval &= (~AR_ANT_DIV_CTRL_ALL);
 	regval |= (ant_div_ctl1 & 0x3f) << AR_ANT_DIV_CTRL_ALL_S;
-	regval &= ~AR_PHY_ANT_DIV_LNADIV;
-	regval |= ((ant_div_ctl1 >> 6) & 0x1) << AR_PHY_ANT_DIV_LNADIV_S;
-
-	if (enable)
-		regval |= AR_ANT_DIV_ENABLE;
-
 	REG_WRITE(ah, AR_PHY_MC_GAIN_CTRL, regval);
 
-	regval = REG_READ(ah, AR_PHY_CCK_DETECT);
-	regval &= ~AR_FAST_DIV_ENABLE;
-	regval |= ((ant_div_ctl1 >> 7) & 0x1) << AR_FAST_DIV_ENABLE_S;
-
-	if (enable)
-		regval |= AR_FAST_DIV_ENABLE;
-
-	REG_WRITE(ah, AR_PHY_CCK_DETECT, regval);
-
-	if (enable) {
-		REG_SET_BIT(ah, AR_PHY_MC_GAIN_CTRL,
-			    (1 << AR_PHY_ANT_SW_RX_PROT_S));
-		if (ah->curchan && IS_CHAN_2GHZ(ah->curchan))
-			REG_SET_BIT(ah, AR_PHY_RESTART,
-				    AR_PHY_RESTART_ENABLE_DIV_M2FLAG);
-		REG_SET_BIT(ah, AR_BTCOEX_WL_LNADIV,
-			    AR_BTCOEX_WL_LNADIV_FORCE_ON);
-	} else {
-		REG_CLR_BIT(ah, AR_PHY_MC_GAIN_CTRL, AR_ANT_DIV_ENABLE);
-		REG_CLR_BIT(ah, AR_PHY_MC_GAIN_CTRL,
-			    (1 << AR_PHY_ANT_SW_RX_PROT_S));
-		REG_CLR_BIT(ah, AR_PHY_CCK_DETECT, AR_FAST_DIV_ENABLE);
-		REG_CLR_BIT(ah, AR_BTCOEX_WL_LNADIV,
-			    AR_BTCOEX_WL_LNADIV_FORCE_ON);
-
+	if (AR_SREV_9485_11_OR_LATER(ah)) {
+		/*
+		 * Enable LNA diversity.
+		 */
 		regval = REG_READ(ah, AR_PHY_MC_GAIN_CTRL);
-		regval &= ~(AR_PHY_ANT_DIV_MAIN_LNACONF |
-			AR_PHY_ANT_DIV_ALT_LNACONF |
-			AR_PHY_ANT_DIV_MAIN_GAINTB |
-			AR_PHY_ANT_DIV_ALT_GAINTB);
-		regval |= (AR_PHY_ANT_DIV_LNA1 << AR_PHY_ANT_DIV_MAIN_LNACONF_S);
-		regval |= (AR_PHY_ANT_DIV_LNA2 << AR_PHY_ANT_DIV_ALT_LNACONF_S);
+		regval &= ~AR_PHY_ANT_DIV_LNADIV;
+		regval |= ((ant_div_ctl1 >> 6) & 0x1) << AR_PHY_ANT_DIV_LNADIV_S;
+		if (enable)
+			regval |= AR_ANT_DIV_ENABLE;
+
 		REG_WRITE(ah, AR_PHY_MC_GAIN_CTRL, regval);
+
+		/*
+		 * Enable fast antenna diversity.
+		 */
+		regval = REG_READ(ah, AR_PHY_CCK_DETECT);
+		regval &= ~AR_FAST_DIV_ENABLE;
+		regval |= ((ant_div_ctl1 >> 7) & 0x1) << AR_FAST_DIV_ENABLE_S;
+		if (enable)
+			regval |= AR_FAST_DIV_ENABLE;
+
+		REG_WRITE(ah, AR_PHY_CCK_DETECT, regval);
+
+		if (pCap->hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) {
+			regval = REG_READ(ah, AR_PHY_MC_GAIN_CTRL);
+			regval &= (~(AR_PHY_ANT_DIV_MAIN_LNACONF |
+				     AR_PHY_ANT_DIV_ALT_LNACONF |
+				     AR_PHY_ANT_DIV_ALT_GAINTB |
+				     AR_PHY_ANT_DIV_MAIN_GAINTB));
+			/*
+			 * Set MAIN to LNA1 and ALT to LNA2 at the
+			 * beginning.
+			 */
+			regval |= (ATH_ANT_DIV_COMB_LNA1 <<
+				   AR_PHY_ANT_DIV_MAIN_LNACONF_S);
+			regval |= (ATH_ANT_DIV_COMB_LNA2 <<
+				   AR_PHY_ANT_DIV_ALT_LNACONF_S);
+			REG_WRITE(ah, AR_PHY_MC_GAIN_CTRL, regval);
+		}
+	} else if (AR_SREV_9565(ah)) {
+		if (enable) {
+			REG_SET_BIT(ah, AR_PHY_MC_GAIN_CTRL,
+				    (1 << AR_PHY_ANT_SW_RX_PROT_S));
+			if (ah->curchan && IS_CHAN_2GHZ(ah->curchan))
+				REG_SET_BIT(ah, AR_PHY_RESTART,
+					    AR_PHY_RESTART_ENABLE_DIV_M2FLAG);
+			REG_SET_BIT(ah, AR_BTCOEX_WL_LNADIV,
+				    AR_BTCOEX_WL_LNADIV_FORCE_ON);
+		} else {
+			REG_CLR_BIT(ah, AR_PHY_MC_GAIN_CTRL, AR_ANT_DIV_ENABLE);
+			REG_CLR_BIT(ah, AR_PHY_MC_GAIN_CTRL,
+				    (1 << AR_PHY_ANT_SW_RX_PROT_S));
+			REG_CLR_BIT(ah, AR_PHY_CCK_DETECT, AR_FAST_DIV_ENABLE);
+			REG_CLR_BIT(ah, AR_BTCOEX_WL_LNADIV,
+				    AR_BTCOEX_WL_LNADIV_FORCE_ON);
+
+			regval = REG_READ(ah, AR_PHY_MC_GAIN_CTRL);
+			regval &= ~(AR_PHY_ANT_DIV_MAIN_LNACONF |
+				    AR_PHY_ANT_DIV_ALT_LNACONF |
+				    AR_PHY_ANT_DIV_MAIN_GAINTB |
+				    AR_PHY_ANT_DIV_ALT_GAINTB);
+			regval |= (ATH_ANT_DIV_COMB_LNA1 <<
+				   AR_PHY_ANT_DIV_MAIN_LNACONF_S);
+			regval |= (ATH_ANT_DIV_COMB_LNA2 <<
+				   AR_PHY_ANT_DIV_ALT_LNACONF_S);
+			REG_WRITE(ah, AR_PHY_MC_GAIN_CTRL, regval);
+		}
 	}
 }
 
+#endif
+
 static int ar9003_hw_fast_chan_change(struct ath_hw *ah,
 				      struct ath9k_channel *chan,
 				      u8 *ini_reloaded)
@@ -1518,6 +1567,18 @@ static int ar9003_hw_fast_chan_change(st
 
 	REG_WRITE_ARRAY(&ah->iniModesTxGain, modesIndex, regWrites);
 
+	if (AR_SREV_9462_20_OR_LATER(ah)) {
+		/*
+		 * CUS217 mix LNA mode.
+		 */
+		if (ar9003_hw_get_rx_gain_idx(ah) == 2) {
+			REG_WRITE_ARRAY(&ah->ini_modes_rxgain_bb_core,
+					1, regWrites);
+			REG_WRITE_ARRAY(&ah->ini_modes_rxgain_bb_postamble,
+					modesIndex, regWrites);
+		}
+	}
+
 	/*
 	 * For 5GHz channels requiring Fast Clock, apply
 	 * different modal values.
@@ -1528,7 +1589,11 @@ static int ar9003_hw_fast_chan_change(st
 	if (AR_SREV_9565(ah))
 		REG_WRITE_ARRAY(&ah->iniModesFastClock, 1, regWrites);
 
-	REG_WRITE_ARRAY(&ah->iniAdditional, 1, regWrites);
+	/*
+	 * JAPAN regulatory.
+	 */
+	if (chan->channel == 2484)
+		ar9003_hw_prog_ini(ah, &ah->iniCckfirJapan2484, 1);
 
 	ah->modes_index = modesIndex;
 	*ini_reloaded = true;
@@ -1631,11 +1696,14 @@ void ar9003_hw_attach_phy_ops(struct ath
 
 	ops->antdiv_comb_conf_get = ar9003_hw_antdiv_comb_conf_get;
 	ops->antdiv_comb_conf_set = ar9003_hw_antdiv_comb_conf_set;
-	ops->antctrl_shared_chain_lnadiv = ar9003_hw_antctrl_shared_chain_lnadiv;
 	ops->spectral_scan_config = ar9003_hw_spectral_scan_config;
 	ops->spectral_scan_trigger = ar9003_hw_spectral_scan_trigger;
 	ops->spectral_scan_wait = ar9003_hw_spectral_scan_wait;
 
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+	ops->set_bt_ant_diversity = ar9003_hw_set_bt_ant_diversity;
+#endif
+
 	ar9003_hw_set_nf_limits(ah);
 	ar9003_hw_set_radar_conf(ah);
 	memcpy(ah->nf_regs, ar9300_cca_regs, sizeof(ah->nf_regs));
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -42,8 +42,6 @@ static void ath_rx_buf_link(struct ath_s
 	struct ath_desc *ds;
 	struct sk_buff *skb;
 
-	ATH_RXBUF_RESET(bf);
-
 	ds = bf->bf_desc;
 	ds->ds_link = 0; /* link to null */
 	ds->ds_data = bf->bf_buf_addr;
@@ -70,6 +68,14 @@ static void ath_rx_buf_link(struct ath_s
 	sc->rx.rxlink = &ds->ds_link;
 }
 
+static void ath_rx_buf_relink(struct ath_softc *sc, struct ath_buf *bf)
+{
+	if (sc->rx.buf_hold)
+		ath_rx_buf_link(sc, sc->rx.buf_hold);
+
+	sc->rx.buf_hold = bf;
+}
+
 static void ath_setdefantenna(struct ath_softc *sc, u32 antenna)
 {
 	/* XXX block beacon interrupts */
@@ -117,7 +123,6 @@ static bool ath_rx_edma_buf_link(struct 
 
 	skb = bf->bf_mpdu;
 
-	ATH_RXBUF_RESET(bf);
 	memset(skb->data, 0, ah->caps.rx_status_len);
 	dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
 				ah->caps.rx_status_len, DMA_TO_DEVICE);
@@ -185,7 +190,7 @@ static void ath_rx_edma_cleanup(struct a
 
 static void ath_rx_edma_init_queue(struct ath_rx_edma *rx_edma, int size)
 {
-	skb_queue_head_init(&rx_edma->rx_fifo);
+	__skb_queue_head_init(&rx_edma->rx_fifo);
 	rx_edma->rx_fifo_hwsize = size;
 }
 
@@ -432,6 +437,7 @@ int ath_startrecv(struct ath_softc *sc)
 	if (list_empty(&sc->rx.rxbuf))
 		goto start_recv;
 
+	sc->rx.buf_hold = NULL;
 	sc->rx.rxlink = NULL;
 	list_for_each_entry_safe(bf, tbf, &sc->rx.rxbuf, list) {
 		ath_rx_buf_link(sc, bf);
@@ -677,6 +683,9 @@ static struct ath_buf *ath_get_next_rx_b
 	}
 
 	bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list);
+	if (bf == sc->rx.buf_hold)
+		return NULL;
+
 	ds = bf->bf_desc;
 
 	/*
@@ -755,7 +764,6 @@ static bool ath9k_rx_accept(struct ath_c
 	bool is_mc, is_valid_tkip, strip_mic, mic_error;
 	struct ath_hw *ah = common->ah;
 	__le16 fc;
-	u8 rx_status_len = ah->caps.rx_status_len;
 
 	fc = hdr->frame_control;
 
@@ -777,25 +785,6 @@ static bool ath9k_rx_accept(struct ath_c
 	    !test_bit(rx_stats->rs_keyix, common->ccmp_keymap))
 		rx_stats->rs_status &= ~ATH9K_RXERR_KEYMISS;
 
-	if (!rx_stats->rs_datalen) {
-		RX_STAT_INC(rx_len_err);
-		return false;
-	}
-
-        /*
-         * rs_status follows rs_datalen so if rs_datalen is too large
-         * we can take a hint that hardware corrupted it, so ignore
-         * those frames.
-         */
-	if (rx_stats->rs_datalen > (common->rx_bufsize - rx_status_len)) {
-		RX_STAT_INC(rx_len_err);
-		return false;
-	}
-
-	/* Only use error bits from the last fragment */
-	if (rx_stats->rs_more)
-		return true;
-
 	mic_error = is_valid_tkip && !ieee80211_is_ctl(fc) &&
 		!ieee80211_has_morefrags(fc) &&
 		!(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG) &&
@@ -814,8 +803,6 @@ static bool ath9k_rx_accept(struct ath_c
 			rxs->flag |= RX_FLAG_FAILED_FCS_CRC;
 			mic_error = false;
 		}
-		if (rx_stats->rs_status & ATH9K_RXERR_PHY)
-			return false;
 
 		if ((rx_stats->rs_status & ATH9K_RXERR_DECRYPT) ||
 		    (!is_mc && (rx_stats->rs_status & ATH9K_RXERR_KEYMISS))) {
@@ -898,129 +885,65 @@ static int ath9k_process_rate(struct ath
 
 static void ath9k_process_rssi(struct ath_common *common,
 			       struct ieee80211_hw *hw,
-			       struct ieee80211_hdr *hdr,
-			       struct ath_rx_status *rx_stats)
+			       struct ath_rx_status *rx_stats,
+			       struct ieee80211_rx_status *rxs)
 {
 	struct ath_softc *sc = hw->priv;
 	struct ath_hw *ah = common->ah;
 	int last_rssi;
 	int rssi = rx_stats->rs_rssi;
 
-	if (!rx_stats->is_mybeacon ||
-	    ((ah->opmode != NL80211_IFTYPE_STATION) &&
-	     (ah->opmode != NL80211_IFTYPE_ADHOC)))
+	/*
+	 * RSSI is not available for subframes in an A-MPDU.
+	 */
+	if (rx_stats->rs_moreaggr) {
+		rxs->flag |= RX_FLAG_NO_SIGNAL_VAL;
 		return;
-
-	if (rx_stats->rs_rssi != ATH9K_RSSI_BAD && !rx_stats->rs_moreaggr)
-		ATH_RSSI_LPF(sc->last_rssi, rx_stats->rs_rssi);
-
-	last_rssi = sc->last_rssi;
-	if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
-		rssi = ATH_EP_RND(last_rssi, ATH_RSSI_EP_MULTIPLIER);
-	if (rssi < 0)
-		rssi = 0;
-
-	/* Update Beacon RSSI, this is used by ANI. */
-	ah->stats.avgbrssi = rssi;
-}
-
-/*
- * For Decrypt or Demic errors, we only mark packet status here and always push
- * up the frame up to let mac80211 handle the actual error case, be it no
- * decryption key or real decryption error. This let us keep statistics there.
- */
-static int ath9k_rx_skb_preprocess(struct ath_softc *sc,
-				   struct ieee80211_hdr *hdr,
-				   struct ath_rx_status *rx_stats,
-				   struct ieee80211_rx_status *rx_status,
-				   bool *decrypt_error)
-{
-	struct ieee80211_hw *hw = sc->hw;
-	struct ath_hw *ah = sc->sc_ah;
-	struct ath_common *common = ath9k_hw_common(ah);
-	bool discard_current = sc->rx.discard_next;
-
-	sc->rx.discard_next = rx_stats->rs_more;
-	if (discard_current)
-		return -EINVAL;
+	}
 
 	/*
-	 * everything but the rate is checked here, the rate check is done
-	 * separately to avoid doing two lookups for a rate for each frame.
+	 * Check if the RSSI for the last subframe in an A-MPDU
+	 * or an unaggregated frame is valid.
 	 */
-	if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error))
-		return -EINVAL;
-
-	/* Only use status info from the last fragment */
-	if (rx_stats->rs_more)
-		return 0;
+	if (rx_stats->rs_rssi == ATH9K_RSSI_BAD) {
+		rxs->flag |= RX_FLAG_NO_SIGNAL_VAL;
+		return;
+	}
 
-	if (ath9k_process_rate(common, hw, rx_stats, rx_status))
-		return -EINVAL;
+	/*
+	 * Update Beacon RSSI, this is used by ANI.
+	 */
+	if (rx_stats->is_mybeacon &&
+	    ((ah->opmode == NL80211_IFTYPE_STATION) ||
+	     (ah->opmode == NL80211_IFTYPE_ADHOC))) {
+		ATH_RSSI_LPF(sc->last_rssi, rx_stats->rs_rssi);
+		last_rssi = sc->last_rssi;
 
-	ath9k_process_rssi(common, hw, hdr, rx_stats);
+		if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
+			rssi = ATH_EP_RND(last_rssi, ATH_RSSI_EP_MULTIPLIER);
+		if (rssi < 0)
+			rssi = 0;
 
-	rx_status->band = hw->conf.chandef.chan->band;
-	rx_status->freq = hw->conf.chandef.chan->center_freq;
-	rx_status->signal = ah->noise + rx_stats->rs_rssi;
-	rx_status->antenna = rx_stats->rs_antenna;
-	rx_status->flag |= RX_FLAG_MACTIME_END;
-	if (rx_stats->rs_moreaggr)
-		rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
+		ah->stats.avgbrssi = rssi;
+	}
 
-	sc->rx.discard_next = false;
-	return 0;
+	rxs->signal = ah->noise + rx_stats->rs_rssi;
 }
 
-static void ath9k_rx_skb_postprocess(struct ath_common *common,
-				     struct sk_buff *skb,
-				     struct ath_rx_status *rx_stats,
-				     struct ieee80211_rx_status *rxs,
-				     bool decrypt_error)
+static void ath9k_process_tsf(struct ath_rx_status *rs,
+			      struct ieee80211_rx_status *rxs,
+			      u64 tsf)
 {
-	struct ath_hw *ah = common->ah;
-	struct ieee80211_hdr *hdr;
-	int hdrlen, padpos, padsize;
-	u8 keyix;
-	__le16 fc;
+	u32 tsf_lower = tsf & 0xffffffff;
 
-	/* see if any padding is done by the hw and remove it */
-	hdr = (struct ieee80211_hdr *) skb->data;
-	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-	fc = hdr->frame_control;
-	padpos = ieee80211_hdrlen(fc);
+	rxs->mactime = (tsf & ~0xffffffffULL) | rs->rs_tstamp;
+	if (rs->rs_tstamp > tsf_lower &&
+	    unlikely(rs->rs_tstamp - tsf_lower > 0x10000000))
+		rxs->mactime -= 0x100000000ULL;
 
-	/* The MAC header is padded to have 32-bit boundary if the
-	 * packet payload is non-zero. The general calculation for
-	 * padsize would take into account odd header lengths:
-	 * padsize = (4 - padpos % 4) % 4; However, since only
-	 * even-length headers are used, padding can only be 0 or 2
-	 * bytes and we can optimize this a bit. In addition, we must
-	 * not try to remove padding from short control frames that do
-	 * not have payload. */
-	padsize = padpos & 3;
-	if (padsize && skb->len>=padpos+padsize+FCS_LEN) {
-		memmove(skb->data + padsize, skb->data, padpos);
-		skb_pull(skb, padsize);
-	}
-
-	keyix = rx_stats->rs_keyix;
-
-	if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error &&
-	    ieee80211_has_protected(fc)) {
-		rxs->flag |= RX_FLAG_DECRYPTED;
-	} else if (ieee80211_has_protected(fc)
-		   && !decrypt_error && skb->len >= hdrlen + 4) {
-		keyix = skb->data[hdrlen + 3] >> 6;
-
-		if (test_bit(keyix, common->keymap))
-			rxs->flag |= RX_FLAG_DECRYPTED;
-	}
-	if (ah->sw_mgmt_crypto &&
-	    (rxs->flag & RX_FLAG_DECRYPTED) &&
-	    ieee80211_is_mgmt(fc))
-		/* Use software decrypt for management frames. */
-		rxs->flag &= ~RX_FLAG_DECRYPTED;
+	if (rs->rs_tstamp < tsf_lower &&
+	    unlikely(tsf_lower - rs->rs_tstamp > 0x10000000))
+		rxs->mactime += 0x100000000ULL;
 }
 
 #ifdef CPTCFG_ATH9K_DEBUGFS
@@ -1133,6 +1056,234 @@ static int ath_process_fft(struct ath_so
 #endif
 }
 
+static bool ath9k_is_mybeacon(struct ath_softc *sc, struct ieee80211_hdr *hdr)
+{
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	if (ieee80211_is_beacon(hdr->frame_control)) {
+		RX_STAT_INC(rx_beacons);
+		if (!is_zero_ether_addr(common->curbssid) &&
+		    ether_addr_equal(hdr->addr3, common->curbssid))
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * For Decrypt or Demic errors, we only mark packet status here and always push
+ * up the frame up to let mac80211 handle the actual error case, be it no
+ * decryption key or real decryption error. This let us keep statistics there.
+ */
+static int ath9k_rx_skb_preprocess(struct ath_softc *sc,
+				   struct sk_buff *skb,
+				   struct ath_rx_status *rx_stats,
+				   struct ieee80211_rx_status *rx_status,
+				   bool *decrypt_error, u64 tsf)
+{
+	struct ieee80211_hw *hw = sc->hw;
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ieee80211_hdr *hdr;
+	bool discard_current = sc->rx.discard_next;
+	int ret = 0;
+
+	/*
+	 * Discard corrupt descriptors which are marked in
+	 * ath_get_next_rx_buf().
+	 */
+	sc->rx.discard_next = rx_stats->rs_more;
+	if (discard_current)
+		return -EINVAL;
+
+	/*
+	 * Discard zero-length packets.
+	 */
+	if (!rx_stats->rs_datalen) {
+		RX_STAT_INC(rx_len_err);
+		return -EINVAL;
+	}
+
+        /*
+         * rs_status follows rs_datalen so if rs_datalen is too large
+         * we can take a hint that hardware corrupted it, so ignore
+         * those frames.
+         */
+	if (rx_stats->rs_datalen > (common->rx_bufsize - ah->caps.rx_status_len)) {
+		RX_STAT_INC(rx_len_err);
+		return -EINVAL;
+	}
+
+	/* Only use status info from the last fragment */
+	if (rx_stats->rs_more)
+		return 0;
+
+	/*
+	 * Return immediately if the RX descriptor has been marked
+	 * as corrupt based on the various error bits.
+	 *
+	 * This is different from the other corrupt descriptor
+	 * condition handled above.
+	 */
+	if (rx_stats->rs_status & ATH9K_RXERR_CORRUPT_DESC) {
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	hdr = (struct ieee80211_hdr *) (skb->data + ah->caps.rx_status_len);
+
+	ath9k_process_tsf(rx_stats, rx_status, tsf);
+	ath_debug_stat_rx(sc, rx_stats);
+
+	/*
+	 * Process PHY errors and return so that the packet
+	 * can be dropped.
+	 */
+	if (rx_stats->rs_status & ATH9K_RXERR_PHY) {
+		ath9k_dfs_process_phyerr(sc, hdr, rx_stats, rx_status->mactime);
+		if (ath_process_fft(sc, hdr, rx_stats, rx_status->mactime))
+			RX_STAT_INC(rx_spectral);
+
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	/*
+	 * everything but the rate is checked here, the rate check is done
+	 * separately to avoid doing two lookups for a rate for each frame.
+	 */
+	if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error)) {
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	rx_stats->is_mybeacon = ath9k_is_mybeacon(sc, hdr);
+	if (rx_stats->is_mybeacon) {
+		sc->hw_busy_count = 0;
+		ath_start_rx_poll(sc, 3);
+	}
+
+	if (ath9k_process_rate(common, hw, rx_stats, rx_status)) {
+		ret =-EINVAL;
+		goto exit;
+	}
+
+	ath9k_process_rssi(common, hw, rx_stats, rx_status);
+
+	rx_status->band = hw->conf.chandef.chan->band;
+	rx_status->freq = hw->conf.chandef.chan->center_freq;
+	rx_status->antenna = rx_stats->rs_antenna;
+	rx_status->flag |= RX_FLAG_MACTIME_END;
+
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+	if (ieee80211_is_data_present(hdr->frame_control) &&
+	    !ieee80211_is_qos_nullfunc(hdr->frame_control))
+		sc->rx.num_pkts++;
+#endif
+
+exit:
+	sc->rx.discard_next = false;
+	return ret;
+}
+
+static void ath9k_rx_skb_postprocess(struct ath_common *common,
+				     struct sk_buff *skb,
+				     struct ath_rx_status *rx_stats,
+				     struct ieee80211_rx_status *rxs,
+				     bool decrypt_error)
+{
+	struct ath_hw *ah = common->ah;
+	struct ieee80211_hdr *hdr;
+	int hdrlen, padpos, padsize;
+	u8 keyix;
+	__le16 fc;
+
+	/* see if any padding is done by the hw and remove it */
+	hdr = (struct ieee80211_hdr *) skb->data;
+	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
+	fc = hdr->frame_control;
+	padpos = ieee80211_hdrlen(fc);
+
+	/* The MAC header is padded to have 32-bit boundary if the
+	 * packet payload is non-zero. The general calculation for
+	 * padsize would take into account odd header lengths:
+	 * padsize = (4 - padpos % 4) % 4; However, since only
+	 * even-length headers are used, padding can only be 0 or 2
+	 * bytes and we can optimize this a bit. In addition, we must
+	 * not try to remove padding from short control frames that do
+	 * not have payload. */
+	padsize = padpos & 3;
+	if (padsize && skb->len>=padpos+padsize+FCS_LEN) {
+		memmove(skb->data + padsize, skb->data, padpos);
+		skb_pull(skb, padsize);
+	}
+
+	keyix = rx_stats->rs_keyix;
+
+	if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error &&
+	    ieee80211_has_protected(fc)) {
+		rxs->flag |= RX_FLAG_DECRYPTED;
+	} else if (ieee80211_has_protected(fc)
+		   && !decrypt_error && skb->len >= hdrlen + 4) {
+		keyix = skb->data[hdrlen + 3] >> 6;
+
+		if (test_bit(keyix, common->keymap))
+			rxs->flag |= RX_FLAG_DECRYPTED;
+	}
+	if (ah->sw_mgmt_crypto &&
+	    (rxs->flag & RX_FLAG_DECRYPTED) &&
+	    ieee80211_is_mgmt(fc))
+		/* Use software decrypt for management frames. */
+		rxs->flag &= ~RX_FLAG_DECRYPTED;
+}
+
+/*
+ * Run the LNA combining algorithm only in these cases:
+ *
+ * Standalone WLAN cards with both LNA/Antenna diversity
+ * enabled in the EEPROM.
+ *
+ * WLAN+BT cards which are in the supported card list
+ * in ath_pci_id_table and the user has loaded the
+ * driver with "bt_ant_diversity" set to true.
+ */
+static void ath9k_antenna_check(struct ath_softc *sc,
+				struct ath_rx_status *rs)
+{
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath9k_hw_capabilities *pCap = &ah->caps;
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB))
+		return;
+
+	/*
+	 * All MPDUs in an aggregate will use the same LNA
+	 * as the first MPDU.
+	 */
+	if (rs->rs_isaggr && !rs->rs_firstaggr)
+		return;
+
+	/*
+	 * Change the default rx antenna if rx diversity
+	 * chooses the other antenna 3 times in a row.
+	 */
+	if (sc->rx.defant != rs->rs_antenna) {
+		if (++sc->rx.rxotherant >= 3)
+			ath_setdefantenna(sc, rs->rs_antenna);
+	} else {
+		sc->rx.rxotherant = 0;
+	}
+
+	if (pCap->hw_caps & ATH9K_HW_CAP_BT_ANT_DIV) {
+		if (common->bt_ant_diversity)
+			ath_ant_comb_scan(sc, rs);
+	} else {
+		ath_ant_comb_scan(sc, rs);
+	}
+}
+
 static void ath9k_apply_ampdu_details(struct ath_softc *sc,
 	struct ath_rx_status *rs, struct ieee80211_rx_status *rxs)
 {
@@ -1159,15 +1310,12 @@ int ath_rx_tasklet(struct ath_softc *sc,
 	struct ath_hw *ah = sc->sc_ah;
 	struct ath_common *common = ath9k_hw_common(ah);
 	struct ieee80211_hw *hw = sc->hw;
-	struct ieee80211_hdr *hdr;
 	int retval;
 	struct ath_rx_status rs;
 	enum ath9k_rx_qtype qtype;
 	bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
 	int dma_type;
-	u8 rx_status_len = ah->caps.rx_status_len;
 	u64 tsf = 0;
-	u32 tsf_lower = 0;
 	unsigned long flags;
 	dma_addr_t new_buf_addr;
 
@@ -1179,7 +1327,6 @@ int ath_rx_tasklet(struct ath_softc *sc,
 	qtype = hp ? ATH9K_RX_QUEUE_HP : ATH9K_RX_QUEUE_LP;
 
 	tsf = ath9k_hw_gettsf64(ah);
-	tsf_lower = tsf & 0xffffffff;
 
 	do {
 		bool decrypt_error = false;
@@ -1206,55 +1353,14 @@ int ath_rx_tasklet(struct ath_softc *sc,
 		else
 			hdr_skb = skb;
 
-		hdr = (struct ieee80211_hdr *) (hdr_skb->data + rx_status_len);
 		rxs = IEEE80211_SKB_RXCB(hdr_skb);
-		if (ieee80211_is_beacon(hdr->frame_control)) {
-			RX_STAT_INC(rx_beacons);
-			if (!is_zero_ether_addr(common->curbssid) &&
-			    ether_addr_equal(hdr->addr3, common->curbssid))
-				rs.is_mybeacon = true;
-			else
-				rs.is_mybeacon = false;
-		}
-		else
-			rs.is_mybeacon = false;
-
-		if (ieee80211_is_data_present(hdr->frame_control) &&
-		    !ieee80211_is_qos_nullfunc(hdr->frame_control))
-			sc->rx.num_pkts++;
-
-		ath_debug_stat_rx(sc, &rs);
-
 		memset(rxs, 0, sizeof(struct ieee80211_rx_status));
 
-		rxs->mactime = (tsf & ~0xffffffffULL) | rs.rs_tstamp;
-		if (rs.rs_tstamp > tsf_lower &&
-		    unlikely(rs.rs_tstamp - tsf_lower > 0x10000000))
-			rxs->mactime -= 0x100000000ULL;
-
-		if (rs.rs_tstamp < tsf_lower &&
-		    unlikely(tsf_lower - rs.rs_tstamp > 0x10000000))
-			rxs->mactime += 0x100000000ULL;
-
-		if (rs.rs_phyerr == ATH9K_PHYERR_RADAR)
-			ath9k_dfs_process_phyerr(sc, hdr, &rs, rxs->mactime);
-
-		if (rs.rs_status & ATH9K_RXERR_PHY) {
-			if (ath_process_fft(sc, hdr, &rs, rxs->mactime)) {
-				RX_STAT_INC(rx_spectral);
-				goto requeue_drop_frag;
-			}
-		}
-
-		retval = ath9k_rx_skb_preprocess(sc, hdr, &rs, rxs,
-						 &decrypt_error);
+		retval = ath9k_rx_skb_preprocess(sc, hdr_skb, &rs, rxs,
+						 &decrypt_error, tsf);
 		if (retval)
 			goto requeue_drop_frag;
 
-		if (rs.is_mybeacon) {
-			sc->hw_busy_count = 0;
-			ath_start_rx_poll(sc, 3);
-		}
 		/* Ensure we always have an skb to requeue once we are done
 		 * processing the current buffer's skb */
 		requeue_skb = ath_rxbuf_alloc(common, common->rx_bufsize, GFP_ATOMIC);
@@ -1308,8 +1414,6 @@ int ath_rx_tasklet(struct ath_softc *sc,
 			sc->rx.frag = skb;
 			goto requeue;
 		}
-		if (rs.rs_status & ATH9K_RXERR_CORRUPT_DESC)
-			goto requeue_drop_frag;
 
 		if (sc->rx.frag) {
 			int space = skb->len - skb_tailroom(hdr_skb);
@@ -1328,22 +1432,6 @@ int ath_rx_tasklet(struct ath_softc *sc,
 			skb = hdr_skb;
 		}
 
-
-		if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) {
-
-			/*
-			 * change the default rx antenna if rx diversity
-			 * chooses the other antenna 3 times in a row.
-			 */
-			if (sc->rx.defant != rs.rs_antenna) {
-				if (++sc->rx.rxotherant >= 3)
-					ath_setdefantenna(sc, rs.rs_antenna);
-			} else {
-				sc->rx.rxotherant = 0;
-			}
-
-		}
-
 		if (rxs->flag & RX_FLAG_MMIC_STRIPPED)
 			skb_trim(skb, skb->len - 8);
 
@@ -1355,8 +1443,7 @@ int ath_rx_tasklet(struct ath_softc *sc,
 			ath_rx_ps(sc, skb, rs.is_mybeacon);
 		spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 
-		if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx == 3)
-			ath_ant_comb_scan(sc, &rs);
+		ath9k_antenna_check(sc, &rs);
 
 		ath9k_apply_ampdu_details(sc, &rs, rxs);
 
@@ -1375,7 +1462,7 @@ requeue:
 		if (edma) {
 			ath_rx_edma_buf_link(sc, qtype);
 		} else {
-			ath_rx_buf_link(sc, bf);
+			ath_rx_buf_relink(sc, bf);
 			ath9k_hw_rxena(ah);
 		}
 	} while (1);
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -53,9 +53,9 @@ static int ath9k_btcoex_enable;
 module_param_named(btcoex_enable, ath9k_btcoex_enable, int, 0444);
 MODULE_PARM_DESC(btcoex_enable, "Enable wifi-BT coexistence");
 
-static int ath9k_enable_diversity;
-module_param_named(enable_diversity, ath9k_enable_diversity, int, 0444);
-MODULE_PARM_DESC(enable_diversity, "Enable Antenna diversity for AR9565");
+static int ath9k_bt_ant_diversity;
+module_param_named(bt_ant_diversity, ath9k_bt_ant_diversity, int, 0444);
+MODULE_PARM_DESC(bt_ant_diversity, "Enable WLAN/BT RX antenna diversity");
 
 bool is_ath9k_unloaded;
 /* We use the hw_value as an index into our private channel structure */
@@ -516,6 +516,7 @@ static void ath9k_init_misc(struct ath_s
 static void ath9k_init_platform(struct ath_softc *sc)
 {
 	struct ath_hw *ah = sc->sc_ah;
+	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct ath_common *common = ath9k_hw_common(ah);
 
 	if (common->bus_ops->ath_bus_type != ATH_PCI)
@@ -525,12 +526,27 @@ static void ath9k_init_platform(struct a
 			       ATH9K_PCI_CUS230)) {
 		ah->config.xlna_gpio = 9;
 		ah->config.xatten_margin_cfg = true;
+		ah->config.alt_mingainidx = true;
+		ah->config.ant_ctrl_comm2g_switch_enable = 0x000BBB88;
+		sc->ant_comb.low_rssi_thresh = 20;
+		sc->ant_comb.fast_div_bias = 3;
 
 		ath_info(common, "Set parameters for %s\n",
 			 (sc->driver_data & ATH9K_PCI_CUS198) ?
 			 "CUS198" : "CUS230");
-	} else if (sc->driver_data & ATH9K_PCI_CUS217) {
+	}
+
+	if (sc->driver_data & ATH9K_PCI_CUS217)
 		ath_info(common, "CUS217 card detected\n");
+
+	if (sc->driver_data & ATH9K_PCI_BT_ANT_DIV) {
+		pCap->hw_caps |= ATH9K_HW_CAP_BT_ANT_DIV;
+		ath_info(common, "Set BT/WLAN RX diversity capability\n");
+	}
+
+	if (sc->driver_data & ATH9K_PCI_D3_L1_WAR) {
+		ah->config.pcie_waen = 0x0040473b;
+		ath_info(common, "Enable WAR for ASPM D3/L1\n");
 	}
 }
 
@@ -584,6 +600,7 @@ static int ath9k_init_softc(u16 devid, s
 {
 	struct ath9k_platform_data *pdata = sc->dev->platform_data;
 	struct ath_hw *ah = NULL;
+	struct ath9k_hw_capabilities *pCap;
 	struct ath_common *common;
 	int ret = 0, i;
 	int csz = 0;
@@ -600,6 +617,7 @@ static int ath9k_init_softc(u16 devid, s
 	ah->reg_ops.rmw = ath9k_reg_rmw;
 	atomic_set(&ah->intr_ref_cnt, -1);
 	sc->sc_ah = ah;
+	pCap = &ah->caps;
 
 	sc->dfs_detector = dfs_pattern_detector_init(ah, NL80211_DFS_UNSET);
 
@@ -631,11 +649,15 @@ static int ath9k_init_softc(u16 devid, s
 	ath9k_init_platform(sc);
 
 	/*
-	 * Enable Antenna diversity only when BTCOEX is disabled
-	 * and the user manually requests the feature.
+	 * Enable WLAN/BT RX Antenna diversity only when:
+	 *
+	 * - BTCOEX is disabled.
+	 * - the user manually requests the feature.
+	 * - the HW cap is set using the platform data.
 	 */
-	if (!common->btcoex_enabled && ath9k_enable_diversity)
-		common->antenna_diversity = 1;
+	if (!common->btcoex_enabled && ath9k_bt_ant_diversity &&
+	    (pCap->hw_caps & ATH9K_HW_CAP_BT_ANT_DIV))
+		common->bt_ant_diversity = 1;
 
 	spin_lock_init(&common->cc_lock);
 
@@ -710,13 +732,15 @@ static void ath9k_init_band_txpower(stru
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *chan;
 	struct ath_hw *ah = sc->sc_ah;
+	struct cfg80211_chan_def chandef;
 	int i;
 
 	sband = &sc->sbands[band];
 	for (i = 0; i < sband->n_channels; i++) {
 		chan = &sband->channels[i];
 		ah->curchan = &ah->channels[chan->hw_value];
-		ath9k_cmn_update_ichannel(ah->curchan, chan, NL80211_CHAN_HT20);
+		cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_HT20);
+		ath9k_cmn_update_ichannel(ah->curchan, &chandef);
 		ath9k_hw_set_txpowerlimit(ah, MAX_RATE_POWER, true);
 	}
 }
@@ -802,7 +826,8 @@ void ath9k_set_hw_capab(struct ath_softc
 		IEEE80211_HW_PS_NULLFUNC_STACK |
 		IEEE80211_HW_SPECTRUM_MGMT |
 		IEEE80211_HW_REPORTS_TX_ACK_STATUS |
-		IEEE80211_HW_SUPPORTS_RC_TABLE;
+		IEEE80211_HW_SUPPORTS_RC_TABLE |
+		IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
 
 	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
 		hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -1878,7 +1878,8 @@ void *carl9170_alloc(size_t priv_size)
 		     IEEE80211_HW_PS_NULLFUNC_STACK |
 		     IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
 		     IEEE80211_HW_SUPPORTS_RC_TABLE |
-		     IEEE80211_HW_SIGNAL_DBM;
+		     IEEE80211_HW_SIGNAL_DBM |
+		     IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
 
 	if (!modparam_noht) {
 		/*
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -6133,7 +6133,8 @@ static int rt2800_probe_hw_mode(struct r
 	    IEEE80211_HW_SUPPORTS_PS |
 	    IEEE80211_HW_PS_NULLFUNC_STACK |
 	    IEEE80211_HW_AMPDU_AGGREGATION |
-	    IEEE80211_HW_REPORTS_TX_ACK_STATUS;
+	    IEEE80211_HW_REPORTS_TX_ACK_STATUS |
+	    IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
 
 	/*
 	 * Don't set IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING for USB devices
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -152,11 +152,14 @@ struct ieee80211_low_level_stats {
  * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed
  * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed
  * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed
+ * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel,
+ *	this is used only with channel switching with CSA
  */
 enum ieee80211_chanctx_change {
 	IEEE80211_CHANCTX_CHANGE_WIDTH		= BIT(0),
 	IEEE80211_CHANCTX_CHANGE_RX_CHAINS	= BIT(1),
 	IEEE80211_CHANCTX_CHANGE_RADAR		= BIT(2),
+	IEEE80211_CHANCTX_CHANGE_CHANNEL	= BIT(3),
 };
 
 /**
@@ -1080,6 +1083,7 @@ enum ieee80211_vif_flags {
  * @addr: address of this interface
  * @p2p: indicates whether this AP or STA interface is a p2p
  *	interface, i.e. a GO or p2p-sta respectively
+ * @csa_active: marks whether a channel switch is going on
  * @driver_flags: flags/capabilities the driver has for this interface,
  *	these need to be set (or cleared) when the interface is added
  *	or, if supported by the driver, the interface type is changed
@@ -1102,6 +1106,7 @@ struct ieee80211_vif {
 	struct ieee80211_bss_conf bss_conf;
 	u8 addr[ETH_ALEN];
 	bool p2p;
+	bool csa_active;
 
 	u8 cab_queue;
 	u8 hw_queue[IEEE80211_NUM_ACS];
@@ -1499,6 +1504,7 @@ enum ieee80211_hw_flags {
 	IEEE80211_HW_SUPPORTS_RC_TABLE			= 1<<24,
 	IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF		= 1<<25,
 	IEEE80211_HW_TIMING_BEACON_ONLY			= 1<<26,
+	IEEE80211_HW_SUPPORTS_HT_CCK_RATES		= 1<<27,
 };
 
 /**
@@ -2633,6 +2639,16 @@ enum ieee80211_roc_type {
  * @ipv6_addr_change: IPv6 address assignment on the given interface changed.
  *	Currently, this is only called for managed or P2P client interfaces.
  *	This callback is optional; it must not sleep.
+ *
+ * @channel_switch_beacon: Starts a channel switch to a new channel.
+ *	Beacons are modified to include CSA or ECSA IEs before calling this
+ *	function. The corresponding count fields in these IEs must be
+ *	decremented, and when they reach zero the driver must call
+ *	ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get()
+ *	get the csa counter decremented by mac80211, but must check if it is
+ *	zero using ieee80211_csa_is_complete() after the beacon has been
+ *	transmitted and then call ieee80211_csa_finish().
+ *
  */
 struct ieee80211_ops {
 	void (*tx)(struct ieee80211_hw *hw,
@@ -2830,6 +2846,9 @@ struct ieee80211_ops {
 				 struct ieee80211_vif *vif,
 				 struct inet6_dev *idev);
 #endif
+	void (*channel_switch_beacon)(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif,
+				      struct cfg80211_chan_def *chandef);
 };
 
 /**
@@ -3325,6 +3344,25 @@ static inline struct sk_buff *ieee80211_
 }
 
 /**
+ * ieee80211_csa_finish - notify mac80211 about channel switch
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * After a channel switch announcement was scheduled and the counter in this
+ * announcement hit zero, this function must be called by the driver to
+ * notify mac80211 that the channel can be changed.
+ */
+void ieee80211_csa_finish(struct ieee80211_vif *vif);
+
+/**
+ * ieee80211_csa_is_complete - find out if counters reached zero
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * This function returns whether the channel switch counters reached zero.
+ */
+bool ieee80211_csa_is_complete(struct ieee80211_vif *vif);
+
+
+/**
  * ieee80211_proberesp_get - retrieve a Probe Response template
  * @hw: pointer obtained from ieee80211_alloc_hw().
  * @vif: &struct ieee80211_vif pointer from the add_interface callback.
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -854,8 +854,8 @@ static int ieee80211_set_probe_resp(stru
 	return 0;
 }
 
-static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
-				   struct cfg80211_beacon_data *params)
+int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
+			    struct cfg80211_beacon_data *params)
 {
 	struct beacon_data *new, *old;
 	int new_head_len, new_tail_len;
@@ -1018,6 +1018,12 @@ static int ieee80211_change_beacon(struc
 
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
+	/* don't allow changing the beacon while CSA is in place - offset
+	 * of channel switch counter may change
+	 */
+	if (sdata->vif.csa_active)
+		return -EBUSY;
+
 	old = rtnl_dereference(sdata->u.ap.beacon);
 	if (!old)
 		return -ENOENT;
@@ -1042,6 +1048,10 @@ static int ieee80211_stop_ap(struct wiph
 		return -ENOENT;
 	old_probe_resp = rtnl_dereference(sdata->u.ap.probe_resp);
 
+	/* abort any running channel switch */
+	sdata->vif.csa_active = false;
+	cancel_work_sync(&sdata->csa_finalize_work);
+
 	/* turn off carrier for this interface and dependent VLANs */
 	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 		netif_carrier_off(vlan->dev);
@@ -2784,6 +2794,178 @@ static int ieee80211_start_radar_detecti
 	return 0;
 }
 
+static struct cfg80211_beacon_data *
+cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
+{
+	struct cfg80211_beacon_data *new_beacon;
+	u8 *pos;
+	int len;
+
+	len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
+	      beacon->proberesp_ies_len + beacon->assocresp_ies_len +
+	      beacon->probe_resp_len;
+
+	new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
+	if (!new_beacon)
+		return NULL;
+
+	pos = (u8 *)(new_beacon + 1);
+	if (beacon->head_len) {
+		new_beacon->head_len = beacon->head_len;
+		new_beacon->head = pos;
+		memcpy(pos, beacon->head, beacon->head_len);
+		pos += beacon->head_len;
+	}
+	if (beacon->tail_len) {
+		new_beacon->tail_len = beacon->tail_len;
+		new_beacon->tail = pos;
+		memcpy(pos, beacon->tail, beacon->tail_len);
+		pos += beacon->tail_len;
+	}
+	if (beacon->beacon_ies_len) {
+		new_beacon->beacon_ies_len = beacon->beacon_ies_len;
+		new_beacon->beacon_ies = pos;
+		memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
+		pos += beacon->beacon_ies_len;
+	}
+	if (beacon->proberesp_ies_len) {
+		new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
+		new_beacon->proberesp_ies = pos;
+		memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
+		pos += beacon->proberesp_ies_len;
+	}
+	if (beacon->assocresp_ies_len) {
+		new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
+		new_beacon->assocresp_ies = pos;
+		memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
+		pos += beacon->assocresp_ies_len;
+	}
+	if (beacon->probe_resp_len) {
+		new_beacon->probe_resp_len = beacon->probe_resp_len;
+		beacon->probe_resp = pos;
+		memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
+		pos += beacon->probe_resp_len;
+	}
+
+	return new_beacon;
+}
+
+void ieee80211_csa_finalize_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     csa_finalize_work);
+	struct ieee80211_local *local = sdata->local;
+	int err, changed;
+
+	if (!ieee80211_sdata_running(sdata))
+		return;
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP))
+		return;
+
+	sdata->radar_required = sdata->csa_radar_required;
+	err = ieee80211_vif_change_channel(sdata, &local->csa_chandef,
+					   &changed);
+	if (WARN_ON(err < 0))
+		return;
+
+	err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon);
+	if (err < 0)
+		return;
+
+	changed |= err;
+	kfree(sdata->u.ap.next_beacon);
+	sdata->u.ap.next_beacon = NULL;
+	sdata->vif.csa_active = false;
+
+	ieee80211_wake_queues_by_reason(&sdata->local->hw,
+					IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_CSA);
+
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	cfg80211_ch_switch_notify(sdata->dev, &local->csa_chandef);
+}
+
+static int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
+				    struct cfg80211_csa_settings *params)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_chanctx *chanctx;
+	int err, num_chanctx;
+
+	if (!list_empty(&local->roc_list) || local->scanning)
+		return -EBUSY;
+
+	if (sdata->wdev.cac_started)
+		return -EBUSY;
+
+	if (cfg80211_chandef_identical(&params->chandef,
+				       &sdata->vif.bss_conf.chandef))
+		return -EINVAL;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!chanctx_conf) {
+		rcu_read_unlock();
+		return -EBUSY;
+	}
+
+	/* don't handle for multi-VIF cases */
+	chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
+	if (chanctx->refcount > 1) {
+		rcu_read_unlock();
+		return -EBUSY;
+	}
+	num_chanctx = 0;
+	list_for_each_entry_rcu(chanctx, &local->chanctx_list, list)
+		num_chanctx++;
+	rcu_read_unlock();
+
+	if (num_chanctx > 1)
+		return -EBUSY;
+
+	/* don't allow another channel switch if one is already active. */
+	if (sdata->vif.csa_active)
+		return -EBUSY;
+
+	/* only handle AP for now. */
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	sdata->u.ap.next_beacon = cfg80211_beacon_dup(&params->beacon_after);
+	if (!sdata->u.ap.next_beacon)
+		return -ENOMEM;
+
+	sdata->csa_counter_offset_beacon = params->counter_offset_beacon;
+	sdata->csa_counter_offset_presp = params->counter_offset_presp;
+	sdata->csa_radar_required = params->radar_required;
+
+	if (params->block_tx)
+		ieee80211_stop_queues_by_reason(&local->hw,
+				IEEE80211_MAX_QUEUE_MAP,
+				IEEE80211_QUEUE_STOP_REASON_CSA);
+
+	err = ieee80211_assign_beacon(sdata, &params->beacon_csa);
+	if (err < 0)
+		return err;
+
+	local->csa_chandef = params->chandef;
+	sdata->vif.csa_active = true;
+
+	ieee80211_bss_info_change_notify(sdata, err);
+	drv_channel_switch_beacon(sdata, &params->chandef);
+
+	return 0;
+}
+
 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
 			     struct ieee80211_channel *chan, bool offchan,
 			     unsigned int wait, const u8 *buf, size_t len,
@@ -3501,4 +3683,5 @@ struct cfg80211_ops mac80211_config_ops 
 	.get_et_strings = ieee80211_get_et_strings,
 	.get_channel = ieee80211_cfg_get_channel,
 	.start_radar_detection = ieee80211_start_radar_detection,
+	.channel_switch = ieee80211_channel_switch,
 };
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -410,6 +410,64 @@ int ieee80211_vif_use_channel(struct iee
 	return ret;
 }
 
+int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata,
+				 const struct cfg80211_chan_def *chandef,
+				 u32 *changed)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *conf;
+	struct ieee80211_chanctx *ctx;
+	int ret;
+	u32 chanctx_changed = 0;
+
+	/* should never be called if not performing a channel switch. */
+	if (WARN_ON(!sdata->vif.csa_active))
+		return -EINVAL;
+
+	if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
+				     IEEE80211_CHAN_DISABLED))
+		return -EINVAL;
+
+	mutex_lock(&local->chanctx_mtx);
+	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					 lockdep_is_held(&local->chanctx_mtx));
+	if (!conf) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ctx = container_of(conf, struct ieee80211_chanctx, conf);
+	if (ctx->refcount != 1) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (sdata->vif.bss_conf.chandef.width != chandef->width) {
+		chanctx_changed = IEEE80211_CHANCTX_CHANGE_WIDTH;
+		*changed |= BSS_CHANGED_BANDWIDTH;
+	}
+
+	sdata->vif.bss_conf.chandef = *chandef;
+	ctx->conf.def = *chandef;
+
+	chanctx_changed |= IEEE80211_CHANCTX_CHANGE_CHANNEL;
+	drv_change_chanctx(local, ctx, chanctx_changed);
+
+	if (!local->use_chanctx) {
+		local->_oper_chandef = *chandef;
+		ieee80211_hw_config(local, 0);
+	}
+
+	ieee80211_recalc_chanctx_chantype(local, ctx);
+	ieee80211_recalc_smps_chanctx(local, ctx);
+	ieee80211_recalc_radar_chanctx(local, ctx);
+
+	ret = 0;
+ out:
+	mutex_unlock(&local->chanctx_mtx);
+	return ret;
+}
+
 int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
 				   const struct cfg80211_chan_def *chandef,
 				   u32 *changed)
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -1104,4 +1104,17 @@ static inline void drv_ipv6_addr_change(
 }
 #endif
 
+static inline void
+drv_channel_switch_beacon(struct ieee80211_sub_if_data *sdata,
+			  struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	if (local->ops->channel_switch_beacon) {
+		trace_drv_channel_switch_beacon(local, sdata, chandef);
+		local->ops->channel_switch_beacon(&local->hw, &sdata->vif,
+						  chandef);
+	}
+}
+
 #endif /* __MAC80211_DRIVER_OPS */
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -53,9 +53,6 @@ struct ieee80211_local;
  * increased memory use (about 2 kB of RAM per entry). */
 #define IEEE80211_FRAGMENT_MAX 4
 
-#define TU_TO_JIFFIES(x)	(usecs_to_jiffies((x) * 1024))
-#define TU_TO_EXP_TIME(x)	(jiffies + TU_TO_JIFFIES(x))
-
 /* power level hasn't been configured (or set to automatic) */
 #define IEEE80211_UNSET_POWER_LEVEL	INT_MIN
 
@@ -259,6 +256,8 @@ struct ieee80211_if_ap {
 	struct beacon_data __rcu *beacon;
 	struct probe_resp __rcu *probe_resp;
 
+	/* to be used after channel switch. */
+	struct cfg80211_beacon_data *next_beacon;
 	struct list_head vlans;
 
 	struct ps_data ps;
@@ -713,6 +712,11 @@ struct ieee80211_sub_if_data {
 
 	struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 
+	struct work_struct csa_finalize_work;
+	int csa_counter_offset_beacon;
+	int csa_counter_offset_presp;
+	bool csa_radar_required;
+
 	/* used to reconfigure hardware SM PS */
 	struct work_struct recalc_smps;
 
@@ -1346,6 +1350,9 @@ void ieee80211_roc_notify_destroy(struct
 void ieee80211_sw_roc_work(struct work_struct *work);
 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
 
+/* channel switch handling */
+void ieee80211_csa_finalize_work(struct work_struct *work);
+
 /* interface handling */
 int ieee80211_iface_init(void);
 void ieee80211_iface_exit(void);
@@ -1367,6 +1374,8 @@ void ieee80211_del_virtual_monitor(struc
 
 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
+int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
+			    struct cfg80211_beacon_data *params);
 
 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
 {
@@ -1627,6 +1636,11 @@ int __must_check
 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
 			       const struct cfg80211_chan_def *chandef,
 			       u32 *changed);
+/* NOTE: only use ieee80211_vif_change_channel() for channel switch */
+int __must_check
+ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata,
+			     const struct cfg80211_chan_def *chandef,
+			     u32 *changed);
 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -1906,6 +1906,32 @@ TRACE_EVENT(api_radar_detected,
 	)
 );
 
+TRACE_EVENT(drv_channel_switch_beacon,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct cfg80211_chan_def *chandef),
+
+	TP_ARGS(local, sdata, chandef),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		CHANDEF_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		CHANDEF_ASSIGN(chandef);
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT VIF_PR_FMT " channel switch to " CHANDEF_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG, CHANDEF_PR_ARG
+	)
+);
+
+
 #ifdef CPTCFG_MAC80211_MESSAGE_TRACING
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM mac80211_msg
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2326,6 +2326,81 @@ static int ieee80211_beacon_add_tim(stru
 	return 0;
 }
 
+void ieee80211_csa_finish(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	ieee80211_queue_work(&sdata->local->hw,
+			     &sdata->csa_finalize_work);
+}
+EXPORT_SYMBOL(ieee80211_csa_finish);
+
+static void ieee80211_update_csa(struct ieee80211_sub_if_data *sdata,
+				 struct beacon_data *beacon)
+{
+	struct probe_resp *resp;
+	int counter_offset_beacon = sdata->csa_counter_offset_beacon;
+	int counter_offset_presp = sdata->csa_counter_offset_presp;
+
+	/* warn if the driver did not check for/react to csa completeness */
+	if (WARN_ON(((u8 *)beacon->tail)[counter_offset_beacon] == 0))
+		return;
+
+	((u8 *)beacon->tail)[counter_offset_beacon]--;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP &&
+	    counter_offset_presp) {
+		rcu_read_lock();
+		resp = rcu_dereference(sdata->u.ap.probe_resp);
+
+		/* if nl80211 accepted the offset, this should not happen. */
+		if (WARN_ON(!resp)) {
+			rcu_read_unlock();
+			return;
+		}
+		resp->data[counter_offset_presp]--;
+		rcu_read_unlock();
+	}
+}
+
+bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct beacon_data *beacon = NULL;
+	u8 *beacon_data;
+	size_t beacon_data_len;
+	int counter_beacon = sdata->csa_counter_offset_beacon;
+	int ret = false;
+
+	if (!ieee80211_sdata_running(sdata))
+		return false;
+
+	rcu_read_lock();
+	if (vif->type == NL80211_IFTYPE_AP) {
+		struct ieee80211_if_ap *ap = &sdata->u.ap;
+
+		beacon = rcu_dereference(ap->beacon);
+		if (WARN_ON(!beacon || !beacon->tail))
+			goto out;
+		beacon_data = beacon->tail;
+		beacon_data_len = beacon->tail_len;
+	} else {
+		WARN_ON(1);
+		goto out;
+	}
+
+	if (WARN_ON(counter_beacon > beacon_data_len))
+		goto out;
+
+	if (beacon_data[counter_beacon] == 0)
+		ret = true;
+ out:
+	rcu_read_unlock();
+
+	return ret;
+}
+EXPORT_SYMBOL(ieee80211_csa_is_complete);
+
 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 					 struct ieee80211_vif *vif,
 					 u16 *tim_offset, u16 *tim_length)
@@ -2356,6 +2431,9 @@ struct sk_buff *ieee80211_beacon_get_tim
 		struct beacon_data *beacon = rcu_dereference(ap->beacon);
 
 		if (beacon) {
+			if (sdata->vif.csa_active)
+				ieee80211_update_csa(sdata, beacon);
+
 			/*
 			 * headroom, head length,
 			 * tail length and maximum TIM length
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -923,4 +923,16 @@ static inline void rdev_crit_proto_stop(
 	trace_rdev_return_void(&rdev->wiphy);
 }
 
+static inline int rdev_channel_switch(struct cfg80211_registered_device *rdev,
+				      struct net_device *dev,
+				      struct cfg80211_csa_settings *params)
+{
+	int ret;
+
+	trace_rdev_channel_switch(&rdev->wiphy, dev, params);
+	ret = rdev->ops->channel_switch(&rdev->wiphy, dev, params);
+	trace_rdev_return_int(&rdev->wiphy, ret);
+	return ret;
+}
+
 #endif /* __CFG80211_RDEV_OPS */
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -1841,6 +1841,39 @@ TRACE_EVENT(rdev_crit_proto_stop,
 		  WIPHY_PR_ARG, WDEV_PR_ARG)
 );
 
+TRACE_EVENT(rdev_channel_switch,
+	TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
+		 struct cfg80211_csa_settings *params),
+	TP_ARGS(wiphy, netdev, params),
+	TP_STRUCT__entry(
+		WIPHY_ENTRY
+		NETDEV_ENTRY
+		CHAN_DEF_ENTRY
+		__field(u16, counter_offset_beacon)
+		__field(u16, counter_offset_presp)
+		__field(bool, radar_required)
+		__field(bool, block_tx)
+		__field(u8, count)
+	),
+	TP_fast_assign(
+		WIPHY_ASSIGN;
+		NETDEV_ASSIGN;
+		CHAN_DEF_ASSIGN(&params->chandef);
+		__entry->counter_offset_beacon = params->counter_offset_beacon;
+		__entry->counter_offset_presp = params->counter_offset_presp;
+		__entry->radar_required = params->radar_required;
+		__entry->block_tx = params->block_tx;
+		__entry->count = params->count;
+	),
+	TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", " CHAN_DEF_PR_FMT
+		  ", block_tx: %d, count: %u, radar_required: %d"
+		  ", counter offsets (beacon/presp): %u/%u",
+		  WIPHY_PR_ARG, NETDEV_PR_ARG, CHAN_DEF_PR_ARG,
+		  __entry->block_tx, __entry->count, __entry->radar_required,
+		  __entry->counter_offset_beacon,
+		  __entry->counter_offset_presp)
+);
+
 /*************************************************************
  *	     cfg80211 exported functions traces		     *
  *************************************************************/
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -159,7 +159,7 @@ struct ath_common {
 
 	bool btcoex_enabled;
 	bool disable_ani;
-	bool antenna_diversity;
+	bool bt_ant_diversity;
 };
 
 struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,
--- a/drivers/net/wireless/ath/ath9k/antenna.c
+++ b/drivers/net/wireless/ath/ath9k/antenna.c
@@ -16,37 +16,119 @@
 
 #include "ath9k.h"
 
-static inline bool ath_is_alt_ant_ratio_better(int alt_ratio, int maxdelta,
+/*
+ * AR9285
+ * ======
+ *
+ * EEPROM has 2 4-bit fields containing the card configuration.
+ *
+ * antdiv_ctl1:
+ * ------------
+ * bb_enable_ant_div_lnadiv : 1
+ * bb_ant_div_alt_gaintb    : 1
+ * bb_ant_div_main_gaintb   : 1
+ * bb_enable_ant_fast_div   : 1
+ *
+ * antdiv_ctl2:
+ * -----------
+ * bb_ant_div_alt_lnaconf  : 2
+ * bb_ant_div_main_lnaconf : 2
+ *
+ * The EEPROM bits are used as follows:
+ * ------------------------------------
+ *
+ * bb_enable_ant_div_lnadiv      - Enable LNA path rx antenna diversity/combining.
+ *                                 Set in AR_PHY_MULTICHAIN_GAIN_CTL.
+ *
+ * bb_ant_div_[alt/main]_gaintb  - 0 -> Antenna config Alt/Main uses gaintable 0
+ *                                 1 -> Antenna config Alt/Main uses gaintable 1
+ *                                 Set in AR_PHY_MULTICHAIN_GAIN_CTL.
+ *
+ * bb_enable_ant_fast_div        - Enable fast antenna diversity.
+ *                                 Set in AR_PHY_CCK_DETECT.
+ *
+ * bb_ant_div_[alt/main]_lnaconf - Alt/Main LNA diversity/combining input config.
+ *                                 Set in AR_PHY_MULTICHAIN_GAIN_CTL.
+ *                                 10=LNA1
+ *                                 01=LNA2
+ *                                 11=LNA1+LNA2
+ *                                 00=LNA1-LNA2
+ *
+ * AR9485 / AR9565 / AR9331
+ * ========================
+ *
+ * The same bits are present in the EEPROM, but the location in the
+ * EEPROM is different (ant_div_control in ar9300_BaseExtension_1).
+ *
+ * ant_div_alt_lnaconf      ==> bit 0~1
+ * ant_div_main_lnaconf     ==> bit 2~3
+ * ant_div_alt_gaintb       ==> bit 4
+ * ant_div_main_gaintb      ==> bit 5
+ * enable_ant_div_lnadiv    ==> bit 6
+ * enable_ant_fast_div      ==> bit 7
+ */
+
+static inline bool ath_is_alt_ant_ratio_better(struct ath_ant_comb *antcomb,
+					       int alt_ratio, int maxdelta,
 					       int mindelta, int main_rssi_avg,
 					       int alt_rssi_avg, int pkt_count)
 {
-	return (((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) &&
-		 (alt_rssi_avg > main_rssi_avg + maxdelta)) ||
-		(alt_rssi_avg > main_rssi_avg + mindelta)) && (pkt_count > 50);
+	if (pkt_count <= 50)
+		return false;
+
+	if (alt_rssi_avg > main_rssi_avg + mindelta)
+		return true;
+
+	if (alt_ratio >= antcomb->ant_ratio2 &&
+	    alt_rssi_avg >= antcomb->low_rssi_thresh &&
+	    (alt_rssi_avg > main_rssi_avg + maxdelta))
+		return true;
+
+	return false;
 }
 
-static inline bool ath_ant_div_comb_alt_check(u8 div_group, int alt_ratio,
-					      int curr_main_set, int curr_alt_set,
-					      int alt_rssi_avg, int main_rssi_avg)
+static inline bool ath_ant_div_comb_alt_check(struct ath_hw_antcomb_conf *conf,
+					      struct ath_ant_comb *antcomb,
+					      int alt_ratio, int alt_rssi_avg,
+					      int main_rssi_avg)
 {
-	bool result = false;
-	switch (div_group) {
+	bool result, set1, set2;
+
+	result = set1 = set2 = false;
+
+	if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2 &&
+	    conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA1)
+		set1 = true;
+
+	if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA1 &&
+	    conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA2)
+		set2 = true;
+
+	switch (conf->div_group) {
 	case 0:
 		if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)
 			result = true;
 		break;
 	case 1:
 	case 2:
-		if ((((curr_main_set == ATH_ANT_DIV_COMB_LNA2) &&
-		      (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) &&
-		      (alt_rssi_avg >= (main_rssi_avg - 5))) ||
-		     ((curr_main_set == ATH_ANT_DIV_COMB_LNA1) &&
-		      (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) &&
-		      (alt_rssi_avg >= (main_rssi_avg - 2)))) &&
-		    (alt_rssi_avg >= 4))
+		if (alt_rssi_avg < 4 || alt_rssi_avg < antcomb->low_rssi_thresh)
+			break;
+
+		if ((set1 && (alt_rssi_avg >= (main_rssi_avg - 5))) ||
+		    (set2 && (alt_rssi_avg >= (main_rssi_avg - 2))) ||
+		    (alt_ratio > antcomb->ant_ratio))
 			result = true;
-		else
-			result = false;
+
+		break;
+	case 3:
+		if (alt_rssi_avg < 4 || alt_rssi_avg < antcomb->low_rssi_thresh)
+			break;
+
+		if ((set1 && (alt_rssi_avg >= (main_rssi_avg - 3))) ||
+		    (set2 && (alt_rssi_avg >= (main_rssi_avg + 3))) ||
+		    (alt_ratio > antcomb->ant_ratio))
+			result = true;
+
 		break;
 	}
 
@@ -108,6 +190,74 @@ static void ath_lnaconf_alt_good_scan(st
 	}
 }
 
+static void ath_ant_set_alt_ratio(struct ath_ant_comb *antcomb,
+				  struct ath_hw_antcomb_conf *conf)
+{
+	/* set alt to the conf with maximun ratio */
+	if (antcomb->first_ratio && antcomb->second_ratio) {
+		if (antcomb->rssi_second > antcomb->rssi_third) {
+			/* first alt*/
+			if ((antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) ||
+			    (antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2))
+				/* Set alt LNA1 or LNA2*/
+				if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2)
+					conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+				else
+					conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+			else
+				/* Set alt to A+B or A-B */
+				conf->alt_lna_conf =
+					antcomb->first_quick_scan_conf;
+		} else if ((antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) ||
+			   (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) {
+			/* Set alt LNA1 or LNA2 */
+			if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2)
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+			else
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+		} else {
+			/* Set alt to A+B or A-B */
+			conf->alt_lna_conf = antcomb->second_quick_scan_conf;
+		}
+	} else if (antcomb->first_ratio) {
+		/* first alt */
+		if ((antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) ||
+		    (antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2))
+			/* Set alt LNA1 or LNA2 */
+			if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2)
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+			else
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+		else
+			/* Set alt to A+B or A-B */
+			conf->alt_lna_conf = antcomb->first_quick_scan_conf;
+	} else if (antcomb->second_ratio) {
+		/* second alt */
+		if ((antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) ||
+		    (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2))
+			/* Set alt LNA1 or LNA2 */
+			if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2)
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+			else
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+		else
+			/* Set alt to A+B or A-B */
+			conf->alt_lna_conf = antcomb->second_quick_scan_conf;
+	} else {
+		/* main is largest */
+		if ((antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) ||
+		    (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2))
+			/* Set alt LNA1 or LNA2 */
+			if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2)
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+			else
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+		else
+			/* Set alt to A+B or A-B */
+			conf->alt_lna_conf = antcomb->main_conf;
+	}
+}
+
 static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb,
 				       struct ath_hw_antcomb_conf *div_ant_conf,
 				       int main_rssi_avg, int alt_rssi_avg,
@@ -129,7 +279,7 @@ static void ath_select_ant_div_from_quic
 
 		if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) {
 			/* main is LNA1 */
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
+			if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_HI,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
 						main_rssi_avg, alt_rssi_avg,
@@ -138,7 +288,7 @@ static void ath_select_ant_div_from_quic
 			else
 				antcomb->first_ratio = false;
 		} else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) {
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
+			if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_MID,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
 						main_rssi_avg, alt_rssi_avg,
@@ -147,11 +297,11 @@ static void ath_select_ant_div_from_quic
 			else
 				antcomb->first_ratio = false;
 		} else {
-			if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) &&
-			      (alt_rssi_avg > main_rssi_avg +
-			       ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) ||
-			     (alt_rssi_avg > main_rssi_avg)) &&
-			    (antcomb->total_pkt_count > 50))
+			if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio,
+						ATH_ANT_DIV_COMB_LNA1_DELTA_HI,
+						0,
+						main_rssi_avg, alt_rssi_avg,
+						antcomb->total_pkt_count))
 				antcomb->first_ratio = true;
 			else
 				antcomb->first_ratio = false;
@@ -164,17 +314,21 @@ static void ath_select_ant_div_from_quic
 		antcomb->rssi_first = main_rssi_avg;
 		antcomb->rssi_third = alt_rssi_avg;
 
-		if (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1)
+		switch(antcomb->second_quick_scan_conf) {
+		case ATH_ANT_DIV_COMB_LNA1:
 			antcomb->rssi_lna1 = alt_rssi_avg;
-		else if (antcomb->second_quick_scan_conf ==
-			 ATH_ANT_DIV_COMB_LNA2)
+			break;
+		case ATH_ANT_DIV_COMB_LNA2:
 			antcomb->rssi_lna2 = alt_rssi_avg;
-		else if (antcomb->second_quick_scan_conf ==
-			 ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2) {
+			break;
+		case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2:
 			if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2)
 				antcomb->rssi_lna2 = main_rssi_avg;
 			else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1)
 				antcomb->rssi_lna1 = main_rssi_avg;
+			break;
+		default:
+			break;
 		}
 
 		if (antcomb->rssi_lna2 > antcomb->rssi_lna1 +
@@ -184,7 +338,7 @@ static void ath_select_ant_div_from_quic
 			div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1;
 
 		if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) {
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
+			if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_HI,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
 						main_rssi_avg, alt_rssi_avg,
@@ -193,7 +347,7 @@ static void ath_select_ant_div_from_quic
 			else
 				antcomb->second_ratio = false;
 		} else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) {
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
+			if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_MID,
 						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
 						main_rssi_avg, alt_rssi_avg,
@@ -202,105 +356,18 @@ static void ath_select_ant_div_from_quic
 			else
 				antcomb->second_ratio = false;
 		} else {
-			if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) &&
-			      (alt_rssi_avg > main_rssi_avg +
-			       ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) ||
-			     (alt_rssi_avg > main_rssi_avg)) &&
-			    (antcomb->total_pkt_count > 50))
+			if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio,
+						ATH_ANT_DIV_COMB_LNA1_DELTA_HI,
+						0,
+						main_rssi_avg, alt_rssi_avg,
+						antcomb->total_pkt_count))
 				antcomb->second_ratio = true;
 			else
 				antcomb->second_ratio = false;
 		}
 
-		/* set alt to the conf with maximun ratio */
-		if (antcomb->first_ratio && antcomb->second_ratio) {
-			if (antcomb->rssi_second > antcomb->rssi_third) {
-				/* first alt*/
-				if ((antcomb->first_quick_scan_conf ==
-				    ATH_ANT_DIV_COMB_LNA1) ||
-				    (antcomb->first_quick_scan_conf ==
-				    ATH_ANT_DIV_COMB_LNA2))
-					/* Set alt LNA1 or LNA2*/
-					if (div_ant_conf->main_lna_conf ==
-					    ATH_ANT_DIV_COMB_LNA2)
-						div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA1;
-					else
-						div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA2;
-				else
-					/* Set alt to A+B or A-B */
-					div_ant_conf->alt_lna_conf =
-						antcomb->first_quick_scan_conf;
-			} else if ((antcomb->second_quick_scan_conf ==
-				   ATH_ANT_DIV_COMB_LNA1) ||
-				   (antcomb->second_quick_scan_conf ==
-				   ATH_ANT_DIV_COMB_LNA2)) {
-				/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-			} else {
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf =
-					antcomb->second_quick_scan_conf;
-			}
-		} else if (antcomb->first_ratio) {
-			/* first alt */
-			if ((antcomb->first_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA1) ||
-			    (antcomb->first_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA2))
-					/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA2;
-			else
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf =
-						antcomb->first_quick_scan_conf;
-		} else if (antcomb->second_ratio) {
-				/* second alt */
-			if ((antcomb->second_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA1) ||
-			    (antcomb->second_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA2))
-				/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-			else
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf =
-						antcomb->second_quick_scan_conf;
-		} else {
-			/* main is largest */
-			if ((antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) ||
-			    (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2))
-				/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA2;
-			else
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf = antcomb->main_conf;
-		}
+		ath_ant_set_alt_ratio(antcomb, div_ant_conf);
+
 		break;
 	default:
 		break;
@@ -430,8 +497,7 @@ static void ath_ant_div_conf_fast_divbia
 			ant_conf->fast_div_bias = 0x1;
 			break;
 		case 0x10: /* LNA2 A-B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
+			if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio))
 				ant_conf->fast_div_bias = 0x1;
 			else
 				ant_conf->fast_div_bias = 0x2;
@@ -440,15 +506,13 @@ static void ath_ant_div_conf_fast_divbia
 			ant_conf->fast_div_bias = 0x1;
 			break;
 		case 0x13: /* LNA2 A+B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
+			if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio))
 				ant_conf->fast_div_bias = 0x1;
 			else
 				ant_conf->fast_div_bias = 0x2;
 			break;
 		case 0x20: /* LNA1 A-B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
+			if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio))
 				ant_conf->fast_div_bias = 0x1;
 			else
 				ant_conf->fast_div_bias = 0x2;
@@ -457,8 +521,7 @@ static void ath_ant_div_conf_fast_divbia
 			ant_conf->fast_div_bias = 0x1;
 			break;
 		case 0x23: /* LNA1 A+B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
+			if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio))
 				ant_conf->fast_div_bias = 0x1;
 			else
 				ant_conf->fast_div_bias = 0x2;
@@ -475,6 +538,9 @@ static void ath_ant_div_conf_fast_divbia
 		default:
 			break;
 		}
+
+		if (antcomb->fast_div_bias)
+			ant_conf->fast_div_bias = antcomb->fast_div_bias;
 	} else if (ant_conf->div_group == 3) {
 		switch ((ant_conf->main_lna_conf << 4) |
 			ant_conf->alt_lna_conf) {
@@ -540,6 +606,138 @@ static void ath_ant_div_conf_fast_divbia
 	}
 }
 
+static void ath_ant_try_scan(struct ath_ant_comb *antcomb,
+			     struct ath_hw_antcomb_conf *conf,
+			     int curr_alt_set, int alt_rssi_avg,
+			     int main_rssi_avg)
+{
+	switch (curr_alt_set) {
+	case ATH_ANT_DIV_COMB_LNA2:
+		antcomb->rssi_lna2 = alt_rssi_avg;
+		antcomb->rssi_lna1 = main_rssi_avg;
+		antcomb->scan = true;
+		/* set to A+B */
+		conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+		conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
+		break;
+	case ATH_ANT_DIV_COMB_LNA1:
+		antcomb->rssi_lna1 = alt_rssi_avg;
+		antcomb->rssi_lna2 = main_rssi_avg;
+		antcomb->scan = true;
+		/* set to A+B */
+		conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+		conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
+		break;
+	case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2:
+		antcomb->rssi_add = alt_rssi_avg;
+		antcomb->scan = true;
+		/* set to A-B */
+		conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
+		break;
+	case ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2:
+		antcomb->rssi_sub = alt_rssi_avg;
+		antcomb->scan = false;
+		if (antcomb->rssi_lna2 >
+		    (antcomb->rssi_lna1 + ATH_ANT_DIV_COMB_LNA1_LNA2_SWITCH_DELTA)) {
+			/* use LNA2 as main LNA */
+			if ((antcomb->rssi_add > antcomb->rssi_lna1) &&
+			    (antcomb->rssi_add > antcomb->rssi_sub)) {
+				/* set to A+B */
+				conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
+			} else if (antcomb->rssi_sub >
+				   antcomb->rssi_lna1) {
+				/* set to A-B */
+				conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
+			} else {
+				/* set to LNA1 */
+				conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+			}
+		} else {
+			/* use LNA1 as main LNA */
+			if ((antcomb->rssi_add > antcomb->rssi_lna2) &&
+			    (antcomb->rssi_add > antcomb->rssi_sub)) {
+				/* set to A+B */
+				conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
+			} else if (antcomb->rssi_sub >
+				   antcomb->rssi_lna1) {
+				/* set to A-B */
+				conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
+			} else {
+				/* set to LNA2 */
+				conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+				conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+			}
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+static bool ath_ant_try_switch(struct ath_hw_antcomb_conf *div_ant_conf,
+			       struct ath_ant_comb *antcomb,
+			       int alt_ratio, int alt_rssi_avg,
+			       int main_rssi_avg, int curr_main_set,
+			       int curr_alt_set)
+{
+	bool ret = false;
+
+	if (ath_ant_div_comb_alt_check(div_ant_conf, antcomb, alt_ratio,
+				       alt_rssi_avg, main_rssi_avg)) {
+		if (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) {
+			/*
+			 * Switch main and alt LNA.
+			 */
+			div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+			div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+		} else if (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) {
+			div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+			div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+		}
+
+		ret = true;
+	} else if ((curr_alt_set != ATH_ANT_DIV_COMB_LNA1) &&
+		   (curr_alt_set != ATH_ANT_DIV_COMB_LNA2)) {
+		/*
+		  Set alt to another LNA.
+		*/
+		if (curr_main_set == ATH_ANT_DIV_COMB_LNA2)
+			div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1;
+		else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1)
+			div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2;
+
+		ret = true;
+	}
+
+	return ret;
+}
+
+static bool ath_ant_short_scan_check(struct ath_ant_comb *antcomb)
+{
+	int alt_ratio;
+
+	if (!antcomb->scan || !antcomb->alt_good)
+		return false;
+
+	if (time_after(jiffies, antcomb->scan_start_time +
+		       msecs_to_jiffies(ATH_ANT_DIV_COMB_SHORT_SCAN_INTR)))
+		return true;
+
+	if (antcomb->total_pkt_count == ATH_ANT_DIV_COMB_SHORT_SCAN_PKTCOUNT) {
+		alt_ratio = ((antcomb->alt_recv_cnt * 100) /
+			     antcomb->total_pkt_count);
+		if (alt_ratio < antcomb->ant_ratio)
+			return true;
+	}
+
+	return false;
+}
+
 void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs)
 {
 	struct ath_hw_antcomb_conf div_ant_conf;
@@ -549,41 +747,46 @@ void ath_ant_comb_scan(struct ath_softc 
 	int main_rssi = rs->rs_rssi_ctl0;
 	int alt_rssi = rs->rs_rssi_ctl1;
 	int rx_ant_conf,  main_ant_conf;
-	bool short_scan = false;
+	bool short_scan = false, ret;
 
 	rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) &
 		       ATH_ANT_RX_MASK;
 	main_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_MAIN_SHIFT) &
 			 ATH_ANT_RX_MASK;
 
+	if (alt_rssi >= antcomb->low_rssi_thresh) {
+		antcomb->ant_ratio = ATH_ANT_DIV_COMB_ALT_ANT_RATIO;
+		antcomb->ant_ratio2 = ATH_ANT_DIV_COMB_ALT_ANT_RATIO2;
+	} else {
+		antcomb->ant_ratio = ATH_ANT_DIV_COMB_ALT_ANT_RATIO_LOW_RSSI;
+		antcomb->ant_ratio2 = ATH_ANT_DIV_COMB_ALT_ANT_RATIO2_LOW_RSSI;
+	}
+
 	/* Record packet only when both main_rssi and  alt_rssi is positive */
 	if (main_rssi > 0 && alt_rssi > 0) {
 		antcomb->total_pkt_count++;
 		antcomb->main_total_rssi += main_rssi;
 		antcomb->alt_total_rssi  += alt_rssi;
+
 		if (main_ant_conf == rx_ant_conf)
 			antcomb->main_recv_cnt++;
 		else
 			antcomb->alt_recv_cnt++;
 	}
 
-	/* Short scan check */
-	if (antcomb->scan && antcomb->alt_good) {
-		if (time_after(jiffies, antcomb->scan_start_time +
-		    msecs_to_jiffies(ATH_ANT_DIV_COMB_SHORT_SCAN_INTR)))
-			short_scan = true;
-		else
-			if (antcomb->total_pkt_count ==
-			    ATH_ANT_DIV_COMB_SHORT_SCAN_PKTCOUNT) {
-				alt_ratio = ((antcomb->alt_recv_cnt * 100) /
-					    antcomb->total_pkt_count);
-				if (alt_ratio < ATH_ANT_DIV_COMB_ALT_ANT_RATIO)
-					short_scan = true;
-			}
+	if (main_ant_conf == rx_ant_conf) {
+		ANT_STAT_INC(ANT_MAIN, recv_cnt);
+		ANT_LNA_INC(ANT_MAIN, rx_ant_conf);
+	} else {
+		ANT_STAT_INC(ANT_ALT, recv_cnt);
+		ANT_LNA_INC(ANT_ALT, rx_ant_conf);
 	}
 
+	/* Short scan check */
+	short_scan = ath_ant_short_scan_check(antcomb);
+
 	if (((antcomb->total_pkt_count < ATH_ANT_DIV_COMB_MAX_PKTCOUNT) ||
-	    rs->rs_moreaggr) && !short_scan)
+	     rs->rs_moreaggr) && !short_scan)
 		return;
 
 	if (antcomb->total_pkt_count) {
@@ -595,15 +798,13 @@ void ath_ant_comb_scan(struct ath_softc 
 				 antcomb->total_pkt_count);
 	}
 
-
 	ath9k_hw_antdiv_comb_conf_get(sc->sc_ah, &div_ant_conf);
 	curr_alt_set = div_ant_conf.alt_lna_conf;
 	curr_main_set = div_ant_conf.main_lna_conf;
-
 	antcomb->count++;
 
 	if (antcomb->count == ATH_ANT_DIV_COMB_MAX_COUNT) {
-		if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) {
+		if (alt_ratio > antcomb->ant_ratio) {
 			ath_lnaconf_alt_good_scan(antcomb, div_ant_conf,
 						  main_rssi_avg);
 			antcomb->alt_good = true;
@@ -617,153 +818,47 @@ void ath_ant_comb_scan(struct ath_softc 
 	}
 
 	if (!antcomb->scan) {
-		if (ath_ant_div_comb_alt_check(div_ant_conf.div_group,
-					alt_ratio, curr_main_set, curr_alt_set,
-					alt_rssi_avg, main_rssi_avg)) {
-			if (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) {
-				/* Switch main and alt LNA */
-				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-				div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA1;
-			} else if (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) {
-				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA2;
-			}
-
-			goto div_comb_done;
-		} else if ((curr_alt_set != ATH_ANT_DIV_COMB_LNA1) &&
-			   (curr_alt_set != ATH_ANT_DIV_COMB_LNA2)) {
-			/* Set alt to another LNA */
-			if (curr_main_set == ATH_ANT_DIV_COMB_LNA2)
-				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-			else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1)
-				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-
-			goto div_comb_done;
-		}
-
-		if ((alt_rssi_avg < (main_rssi_avg +
-				     div_ant_conf.lna1_lna2_delta)))
+		ret = ath_ant_try_switch(&div_ant_conf, antcomb, alt_ratio,
+					 alt_rssi_avg, main_rssi_avg,
+					 curr_main_set, curr_alt_set);
+		if (ret)
 			goto div_comb_done;
 	}
 
+	if (!antcomb->scan &&
+	    (alt_rssi_avg < (main_rssi_avg + div_ant_conf.lna1_lna2_delta)))
+		goto div_comb_done;
+
 	if (!antcomb->scan_not_start) {
-		switch (curr_alt_set) {
-		case ATH_ANT_DIV_COMB_LNA2:
-			antcomb->rssi_lna2 = alt_rssi_avg;
-			antcomb->rssi_lna1 = main_rssi_avg;
-			antcomb->scan = true;
-			/* set to A+B */
-			div_ant_conf.main_lna_conf =
-				ATH_ANT_DIV_COMB_LNA1;
-			div_ant_conf.alt_lna_conf  =
-				ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-			break;
-		case ATH_ANT_DIV_COMB_LNA1:
-			antcomb->rssi_lna1 = alt_rssi_avg;
-			antcomb->rssi_lna2 = main_rssi_avg;
-			antcomb->scan = true;
-			/* set to A+B */
-			div_ant_conf.main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
-			div_ant_conf.alt_lna_conf  =
-				ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-			break;
-		case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2:
-			antcomb->rssi_add = alt_rssi_avg;
-			antcomb->scan = true;
-			/* set to A-B */
-			div_ant_conf.alt_lna_conf =
-				ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-			break;
-		case ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2:
-			antcomb->rssi_sub = alt_rssi_avg;
-			antcomb->scan = false;
-			if (antcomb->rssi_lna2 >
-			    (antcomb->rssi_lna1 +
-			    ATH_ANT_DIV_COMB_LNA1_LNA2_SWITCH_DELTA)) {
-				/* use LNA2 as main LNA */
-				if ((antcomb->rssi_add > antcomb->rssi_lna1) &&
-				    (antcomb->rssi_add > antcomb->rssi_sub)) {
-					/* set to A+B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-					div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-				} else if (antcomb->rssi_sub >
-					   antcomb->rssi_lna1) {
-					/* set to A-B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-				} else {
-					/* set to LNA1 */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				}
-			} else {
-				/* use LNA1 as main LNA */
-				if ((antcomb->rssi_add > antcomb->rssi_lna2) &&
-				    (antcomb->rssi_add > antcomb->rssi_sub)) {
-					/* set to A+B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-					div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-				} else if (antcomb->rssi_sub >
-					   antcomb->rssi_lna1) {
-					/* set to A-B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-				} else {
-					/* set to LNA2 */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-				}
-			}
-			break;
-		default:
-			break;
-		}
+		ath_ant_try_scan(antcomb, &div_ant_conf, curr_alt_set,
+				 alt_rssi_avg, main_rssi_avg);
 	} else {
 		if (!antcomb->alt_good) {
 			antcomb->scan_not_start = false;
 			/* Set alt to another LNA */
 			if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) {
 				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
+					ATH_ANT_DIV_COMB_LNA2;
 				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
+					ATH_ANT_DIV_COMB_LNA1;
 			} else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) {
 				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
+					ATH_ANT_DIV_COMB_LNA1;
 				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
+					ATH_ANT_DIV_COMB_LNA2;
 			}
 			goto div_comb_done;
 		}
+		ath_select_ant_div_from_quick_scan(antcomb, &div_ant_conf,
+						   main_rssi_avg, alt_rssi_avg,
+						   alt_ratio);
+		antcomb->quick_scan_cnt++;
 	}
 
-	ath_select_ant_div_from_quick_scan(antcomb, &div_ant_conf,
-					   main_rssi_avg, alt_rssi_avg,
-					   alt_ratio);
-
-	antcomb->quick_scan_cnt++;
-
 div_comb_done:
 	ath_ant_div_conf_fast_divbias(&div_ant_conf, antcomb, alt_ratio);
 	ath9k_hw_antdiv_comb_conf_set(sc->sc_ah, &div_ant_conf);
+	ath9k_debug_stat_ant(sc, &div_ant_conf, main_rssi_avg, alt_rssi_avg);
 
 	antcomb->scan_start_time = jiffies;
 	antcomb->total_pkt_count = 0;
@@ -772,26 +867,3 @@ div_comb_done:
 	antcomb->main_recv_cnt = 0;
 	antcomb->alt_recv_cnt = 0;
 }
-
-void ath_ant_comb_update(struct ath_softc *sc)
-{
-	struct ath_hw *ah = sc->sc_ah;
-	struct ath_common *common = ath9k_hw_common(ah);
-	struct ath_hw_antcomb_conf div_ant_conf;
-	u8 lna_conf;
-
-	ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
-
-	if (sc->ant_rx == 1)
-		lna_conf = ATH_ANT_DIV_COMB_LNA1;
-	else
-		lna_conf = ATH_ANT_DIV_COMB_LNA2;
-
-	div_ant_conf.main_lna_conf = lna_conf;
-	div_ant_conf.alt_lna_conf = lna_conf;
-
-	ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
-
-	if (common->antenna_diversity)
-		ath9k_hw_antctrl_shared_chain_lnadiv(ah, true);
-}
--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
@@ -610,7 +610,15 @@ static void ar5008_hw_override_ini(struc
 	REG_SET_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
 
 	if (AR_SREV_9280_20_OR_LATER(ah)) {
-		val = REG_READ(ah, AR_PCU_MISC_MODE2);
+		/*
+		 * For AR9280 and above, there is a new feature that allows
+		 * Multicast search based on both MAC Address and Key ID.
+		 * By default, this feature is enabled. But since the driver
+		 * is not using this feature, we switch it off; otherwise
+		 * multicast search based on MAC addr only will fail.
+		 */
+		val = REG_READ(ah, AR_PCU_MISC_MODE2) &
+			(~AR_ADHOC_MCAST_KEYID_ENABLE);
 
 		if (!AR_SREV_9271(ah))
 			val &= ~AR_PCU_MISC_MODE2_HWWAR1;
--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
@@ -555,6 +555,69 @@ static void ar9002_hw_antdiv_comb_conf_s
 	REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
 }
 
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+
+static void ar9002_hw_set_bt_ant_diversity(struct ath_hw *ah, bool enable)
+{
+	struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
+	u8 antdiv_ctrl1, antdiv_ctrl2;
+	u32 regval;
+
+	if (enable) {
+		antdiv_ctrl1 = ATH_BT_COEX_ANTDIV_CONTROL1_ENABLE;
+		antdiv_ctrl2 = ATH_BT_COEX_ANTDIV_CONTROL2_ENABLE;
+
+		/*
+		 * Don't disable BT ant to allow BB to control SWCOM.
+		 */
+		btcoex->bt_coex_mode2 &= (~(AR_BT_DISABLE_BT_ANT));
+		REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
+
+		REG_WRITE(ah, AR_PHY_SWITCH_COM, ATH_BT_COEX_ANT_DIV_SWITCH_COM);
+		REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0, 0, 0xf0000000);
+	} else {
+		/*
+		 * Disable antenna diversity, use LNA1 only.
+		 */
+		antdiv_ctrl1 = ATH_BT_COEX_ANTDIV_CONTROL1_FIXED_A;
+		antdiv_ctrl2 = ATH_BT_COEX_ANTDIV_CONTROL2_FIXED_A;
+
+		/*
+		 * Disable BT Ant. to allow concurrent BT and WLAN receive.
+		 */
+		btcoex->bt_coex_mode2 |= AR_BT_DISABLE_BT_ANT;
+		REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
+
+		/*
+		 * Program SWCOM table to make sure RF switch always parks
+		 * at BT side.
+		 */
+		REG_WRITE(ah, AR_PHY_SWITCH_COM, 0);
+		REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0, 0, 0xf0000000);
+	}
+
+	regval = REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
+	regval &= (~(AR_PHY_9285_ANT_DIV_CTL_ALL));
+        /*
+	 * Clear ant_fast_div_bias [14:9] since for WB195,
+	 * the main LNA is always LNA1.
+	 */
+	regval &= (~(AR_PHY_9285_FAST_DIV_BIAS));
+	regval |= SM(antdiv_ctrl1, AR_PHY_9285_ANT_DIV_CTL);
+	regval |= SM(antdiv_ctrl2, AR_PHY_9285_ANT_DIV_ALT_LNACONF);
+	regval |= SM((antdiv_ctrl2 >> 2), AR_PHY_9285_ANT_DIV_MAIN_LNACONF);
+	regval |= SM((antdiv_ctrl1 >> 1), AR_PHY_9285_ANT_DIV_ALT_GAINTB);
+	regval |= SM((antdiv_ctrl1 >> 2), AR_PHY_9285_ANT_DIV_MAIN_GAINTB);
+	REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
+
+	regval = REG_READ(ah, AR_PHY_CCK_DETECT);
+	regval &= (~AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV);
+	regval |= SM((antdiv_ctrl1 >> 3), AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV);
+	REG_WRITE(ah, AR_PHY_CCK_DETECT, regval);
+}
+
+#endif
+
 static void ar9002_hw_spectral_scan_config(struct ath_hw *ah,
 				    struct ath_spec_scan *param)
 {
@@ -634,5 +697,9 @@ void ar9002_hw_attach_phy_ops(struct ath
 	ops->spectral_scan_trigger = ar9002_hw_spectral_scan_trigger;
 	ops->spectral_scan_wait = ar9002_hw_spectral_scan_wait;
 
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+	ops->set_bt_ant_diversity = ar9002_hw_set_bt_ant_diversity;
+#endif
+
 	ar9002_hw_set_nf_limits(ah);
 }
--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.h
+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.h
@@ -317,13 +317,15 @@
 #define AR_PHY_9285_ANT_DIV_ALT_GAINTB_S    29
 #define AR_PHY_9285_ANT_DIV_MAIN_GAINTB     0x40000000
 #define AR_PHY_9285_ANT_DIV_MAIN_GAINTB_S   30
-#define AR_PHY_9285_ANT_DIV_LNA1            2
-#define AR_PHY_9285_ANT_DIV_LNA2            1
-#define AR_PHY_9285_ANT_DIV_LNA1_PLUS_LNA2  3
-#define AR_PHY_9285_ANT_DIV_LNA1_MINUS_LNA2 0
 #define AR_PHY_9285_ANT_DIV_GAINTB_0        0
 #define AR_PHY_9285_ANT_DIV_GAINTB_1        1
 
+#define ATH_BT_COEX_ANTDIV_CONTROL1_ENABLE  0x0b
+#define ATH_BT_COEX_ANTDIV_CONTROL2_ENABLE  0x09
+#define ATH_BT_COEX_ANTDIV_CONTROL1_FIXED_A 0x04
+#define ATH_BT_COEX_ANTDIV_CONTROL2_FIXED_A 0x09
+#define ATH_BT_COEX_ANT_DIV_SWITCH_COM      0x66666666
+
 #define AR_PHY_EXT_CCA0             0x99b8
 #define AR_PHY_EXT_CCA0_THRESH62    0x000000FF
 #define AR_PHY_EXT_CCA0_THRESH62_S  0
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -3541,13 +3541,12 @@ static u16 ar9003_switch_com_spdt_get(st
 	return le16_to_cpu(ar9003_modal_header(ah, is2ghz)->switchcomspdt);
 }
 
-
-static u32 ar9003_hw_ant_ctrl_common_get(struct ath_hw *ah, bool is2ghz)
+u32 ar9003_hw_ant_ctrl_common_get(struct ath_hw *ah, bool is2ghz)
 {
 	return le32_to_cpu(ar9003_modal_header(ah, is2ghz)->antCtrlCommon);
 }
 
-static u32 ar9003_hw_ant_ctrl_common_2_get(struct ath_hw *ah, bool is2ghz)
+u32 ar9003_hw_ant_ctrl_common_2_get(struct ath_hw *ah, bool is2ghz)
 {
 	return le32_to_cpu(ar9003_modal_header(ah, is2ghz)->antCtrlCommon2);
 }
@@ -3561,6 +3560,7 @@ static u16 ar9003_hw_ant_ctrl_chain_get(
 
 static void ar9003_hw_ant_ctrl_apply(struct ath_hw *ah, bool is2ghz)
 {
+	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	int chain;
 	u32 regval, value, gpio;
@@ -3614,6 +3614,11 @@ static void ar9003_hw_ant_ctrl_apply(str
 	}
 
 	value = ar9003_hw_ant_ctrl_common_2_get(ah, is2ghz);
+	if (AR_SREV_9485(ah) && common->bt_ant_diversity) {
+		regval &= ~AR_SWITCH_TABLE_COM2_ALL;
+		regval |= ah->config.ant_ctrl_comm2g_switch_enable;
+
+	}
 	REG_RMW_FIELD(ah, AR_PHY_SWITCH_COM_2, AR_SWITCH_TABLE_COM2_ALL, value);
 
 	if ((AR_SREV_9462(ah)) && (ah->rxchainmask == 0x2)) {
@@ -3645,8 +3650,11 @@ static void ar9003_hw_ant_ctrl_apply(str
 		regval &= (~AR_PHY_ANT_DIV_LNADIV);
 		regval |= ((value >> 6) & 0x1) << AR_PHY_ANT_DIV_LNADIV_S;
 
+		if (AR_SREV_9485(ah) && common->bt_ant_diversity)
+			regval |= AR_ANT_DIV_ENABLE;
+
 		if (AR_SREV_9565(ah)) {
-			if (ah->shared_chain_lnadiv) {
+			if (common->bt_ant_diversity) {
 				regval |= (1 << AR_PHY_ANT_SW_RX_PROT_S);
 			} else {
 				regval &= ~(1 << AR_PHY_ANT_DIV_LNADIV_S);
@@ -3656,10 +3664,14 @@ static void ar9003_hw_ant_ctrl_apply(str
 
 		REG_WRITE(ah, AR_PHY_MC_GAIN_CTRL, regval);
 
-		/*enable fast_div */
+		/* enable fast_div */
 		regval = REG_READ(ah, AR_PHY_CCK_DETECT);
 		regval &= (~AR_FAST_DIV_ENABLE);
 		regval |= ((value >> 7) & 0x1) << AR_FAST_DIV_ENABLE_S;
+
+		if (AR_SREV_9485(ah) && common->bt_ant_diversity)
+			regval |= AR_FAST_DIV_ENABLE;
+
 		REG_WRITE(ah, AR_PHY_CCK_DETECT, regval);
 
 		if (pCap->hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) {
@@ -3673,9 +3685,9 @@ static void ar9003_hw_ant_ctrl_apply(str
 				     AR_PHY_ANT_DIV_ALT_GAINTB |
 				     AR_PHY_ANT_DIV_MAIN_GAINTB));
 			/* by default use LNA1 for the main antenna */
-			regval |= (AR_PHY_ANT_DIV_LNA1 <<
+			regval |= (ATH_ANT_DIV_COMB_LNA1 <<
 				   AR_PHY_ANT_DIV_MAIN_LNACONF_S);
-			regval |= (AR_PHY_ANT_DIV_LNA2 <<
+			regval |= (ATH_ANT_DIV_COMB_LNA2 <<
 				   AR_PHY_ANT_DIV_ALT_LNACONF_S);
 			REG_WRITE(ah, AR_PHY_MC_GAIN_CTRL, regval);
 		}
@@ -3813,6 +3825,11 @@ static void ar9003_hw_atten_apply(struct
 			else
 				value = ar9003_hw_atten_chain_get_margin(ah, i, chan);
 
+			if (ah->config.alt_mingainidx)
+				REG_RMW_FIELD(ah, AR_PHY_EXT_ATTEN_CTL_0,
+					      AR_PHY_EXT_ATTEN_CTL_XATTEN1_MARGIN,
+					      value);
+
 			REG_RMW_FIELD(ah, ext_atten_reg[i],
 				      AR_PHY_EXT_ATTEN_CTL_XATTEN1_MARGIN,
 				      value);
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
@@ -334,6 +334,8 @@ struct ar9300_eeprom {
 
 s32 ar9003_hw_get_tx_gain_idx(struct ath_hw *ah);
 s32 ar9003_hw_get_rx_gain_idx(struct ath_hw *ah);
+u32 ar9003_hw_ant_ctrl_common_get(struct ath_hw *ah, bool is2ghz);
+u32 ar9003_hw_ant_ctrl_common_2_get(struct ath_hw *ah, bool is2ghz);
 
 u8 *ar9003_get_spur_chan_ptr(struct ath_hw *ah, bool is_2ghz);
 
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.h
@@ -148,6 +148,8 @@
 #define AR_PHY_SFCORR_SPUR_SUBCHNL_SD_S   28
 #define AR_PHY_EXT_CCA_THRESH62 0x007F0000
 #define AR_PHY_EXT_CCA_THRESH62_S       16
+#define AR_PHY_EXTCHN_PWRTHR1_ANT_DIV_ALT_ANT_MINGAINIDX    0x0000FF00
+#define AR_PHY_EXTCHN_PWRTHR1_ANT_DIV_ALT_ANT_MINGAINIDX_S  8
 #define AR_PHY_EXT_MINCCA_PWR   0x01FF0000
 #define AR_PHY_EXT_MINCCA_PWR_S 16
 #define AR_PHY_EXT_CYCPWR_THR1 0x0000FE00L
@@ -296,11 +298,6 @@
 #define AR_PHY_ANT_DIV_MAIN_GAINTB              0x40000000
 #define AR_PHY_ANT_DIV_MAIN_GAINTB_S            30
 
-#define AR_PHY_ANT_DIV_LNA1_MINUS_LNA2          0x0
-#define AR_PHY_ANT_DIV_LNA2                     0x1
-#define AR_PHY_ANT_DIV_LNA1                     0x2
-#define AR_PHY_ANT_DIV_LNA1_PLUS_LNA2           0x3
-
 #define AR_PHY_EXTCHN_PWRTHR1   (AR_AGC_BASE + 0x2c)
 #define AR_PHY_EXT_CHN_WIN      (AR_AGC_BASE + 0x30)
 #define AR_PHY_20_40_DET_THR    (AR_AGC_BASE + 0x34)
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -28,9 +28,13 @@ struct fft_sample_tlv;
 #ifdef CPTCFG_ATH9K_DEBUGFS
 #define TX_STAT_INC(q, c) sc->debug.stats.txstats[q].c++
 #define RESET_STAT_INC(sc, type) sc->debug.stats.reset[type]++
+#define ANT_STAT_INC(i, c) sc->debug.stats.ant_stats[i].c++
+#define ANT_LNA_INC(i, c) sc->debug.stats.ant_stats[i].lna_recv_cnt[c]++;
 #else
 #define TX_STAT_INC(q, c) do { } while (0)
 #define RESET_STAT_INC(sc, type) do { } while (0)
+#define ANT_STAT_INC(i, c) do { } while (0)
+#define ANT_LNA_INC(i, c) do { } while (0)
 #endif
 
 enum ath_reset_type {
@@ -243,11 +247,22 @@ struct ath_rx_stats {
 	u32 rx_spectral;
 };
 
+#define ANT_MAIN 0
+#define ANT_ALT  1
+
+struct ath_antenna_stats {
+	u32 recv_cnt;
+	u32 rssi_avg;
+	u32 lna_recv_cnt[4];
+	u32 lna_attempt_cnt[4];
+};
+
 struct ath_stats {
 	struct ath_interrupt_stats istats;
 	struct ath_tx_stats txstats[ATH9K_NUM_TX_QUEUES];
 	struct ath_rx_stats rxstats;
 	struct ath_dfs_stats dfs_stats;
+	struct ath_antenna_stats ant_stats[2];
 	u32 reset[__RESET_TYPE_MAX];
 };
 
@@ -281,10 +296,11 @@ void ath9k_sta_remove_debugfs(struct iee
 			      struct ieee80211_vif *vif,
 			      struct ieee80211_sta *sta,
 			      struct dentry *dir);
-
 void ath_debug_send_fft_sample(struct ath_softc *sc,
 			       struct fft_sample_tlv *fft_sample);
-
+void ath9k_debug_stat_ant(struct ath_softc *sc,
+			  struct ath_hw_antcomb_conf *div_ant_conf,
+			  int main_rssi_avg, int alt_rssi_avg);
 #else
 
 #define RX_STAT_INC(c) /* NOP */
@@ -297,12 +313,10 @@ static inline int ath9k_init_debug(struc
 static inline void ath9k_deinit_debug(struct ath_softc *sc)
 {
 }
-
 static inline void ath_debug_stat_interrupt(struct ath_softc *sc,
 					    enum ath9k_int status)
 {
 }
-
 static inline void ath_debug_stat_tx(struct ath_softc *sc,
 				     struct ath_buf *bf,
 				     struct ath_tx_status *ts,
@@ -310,11 +324,16 @@ static inline void ath_debug_stat_tx(str
 				     unsigned int flags)
 {
 }
-
 static inline void ath_debug_stat_rx(struct ath_softc *sc,
 				     struct ath_rx_status *rs)
 {
 }
+static inline void ath9k_debug_stat_ant(struct ath_softc *sc,
+					struct ath_hw_antcomb_conf *div_ant_conf,
+					int main_rssi_avg, int alt_rssi_avg)
+{
+
+}
 
 #endif /* CPTCFG_ATH9K_DEBUGFS */
 
--- a/drivers/net/wireless/ath/ath9k/eeprom_4k.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_4k.c
@@ -812,6 +812,7 @@ static void ath9k_hw_4k_set_gain(struct 
 static void ath9k_hw_4k_set_board_values(struct ath_hw *ah,
 					 struct ath9k_channel *chan)
 {
+	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct modal_eep_4k_header *pModal;
 	struct ar5416_eeprom_4k *eep = &ah->eeprom.map4k;
 	struct base_eep_header_4k *pBase = &eep->baseEepHeader;
@@ -858,6 +859,24 @@ static void ath9k_hw_4k_set_board_values
 
 		REG_WRITE(ah, AR_PHY_CCK_DETECT, regVal);
 		regVal = REG_READ(ah, AR_PHY_CCK_DETECT);
+
+		if (pCap->hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) {
+			/*
+			 * If diversity combining is enabled,
+			 * set MAIN to LNA1 and ALT to LNA2 initially.
+			 */
+			regVal = REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
+			regVal &= (~(AR_PHY_9285_ANT_DIV_MAIN_LNACONF |
+				     AR_PHY_9285_ANT_DIV_ALT_LNACONF));
+
+			regVal |= (ATH_ANT_DIV_COMB_LNA1 <<
+				   AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S);
+			regVal |= (ATH_ANT_DIV_COMB_LNA2 <<
+				   AR_PHY_9285_ANT_DIV_ALT_LNACONF_S);
+			regVal &= (~(AR_PHY_9285_FAST_DIV_BIAS));
+			regVal |= (0 << AR_PHY_9285_FAST_DIV_BIAS_S);
+			REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regVal);
+		}
 	}
 
 	if (pModal->version >= 2) {
--- a/drivers/net/wireless/ath/ath9k/hw-ops.h
+++ b/drivers/net/wireless/ath/ath9k/hw-ops.h
@@ -78,13 +78,16 @@ static inline void ath9k_hw_antdiv_comb_
 	ath9k_hw_ops(ah)->antdiv_comb_conf_set(ah, antconf);
 }
 
-static inline void ath9k_hw_antctrl_shared_chain_lnadiv(struct ath_hw *ah,
-							bool enable)
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+
+static inline void ath9k_hw_set_bt_ant_diversity(struct ath_hw *ah, bool enable)
 {
-	if (ath9k_hw_ops(ah)->antctrl_shared_chain_lnadiv)
-		ath9k_hw_ops(ah)->antctrl_shared_chain_lnadiv(ah, enable);
+	if (ath9k_hw_ops(ah)->set_bt_ant_diversity)
+		ath9k_hw_ops(ah)->set_bt_ant_diversity(ah, enable);
 }
 
+#endif
+
 /* Private hardware call ops */
 
 /* PHY ops */
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -450,7 +450,6 @@ static void ath9k_hw_init_config(struct 
 	ah->config.ack_6mb = 0x0;
 	ah->config.cwm_ignore_extcca = 0;
 	ah->config.pcie_clock_req = 0;
-	ah->config.pcie_waen = 0;
 	ah->config.analog_shiftreg = 1;
 
 	for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
@@ -1069,7 +1068,7 @@ void ath9k_hw_init_global_settings(struc
 		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
 		    tx_lat += 11;
 
-		sifstime *= 2;
+		sifstime = 32;
 		ack_offset = 16;
 		slottime = 13;
 	} else if (IS_CHAN_QUARTER_RATE(chan)) {
@@ -1079,7 +1078,7 @@ void ath9k_hw_init_global_settings(struc
 		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
 		    tx_lat += 22;
 
-		sifstime *= 4;
+		sifstime = 64;
 		ack_offset = 32;
 		slottime = 21;
 	} else {
@@ -1116,7 +1115,6 @@ void ath9k_hw_init_global_settings(struc
 		ctstimeout += 48 - sifstime - ah->slottime;
 	}
 
-
 	ath9k_hw_set_sifs_time(ah, sifstime);
 	ath9k_hw_setslottime(ah, slottime);
 	ath9k_hw_set_ack_timeout(ah, acktimeout);
@@ -1496,16 +1494,18 @@ static bool ath9k_hw_channel_change(stru
 				    struct ath9k_channel *chan)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_capabilities *pCap = &ah->caps;
+	bool band_switch = false, mode_diff = false;
+	u8 ini_reloaded = 0;
 	u32 qnum;
 	int r;
-	bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
-	bool band_switch, mode_diff;
-	u8 ini_reloaded;
-
-	band_switch = (chan->channelFlags & (CHANNEL_2GHZ | CHANNEL_5GHZ)) !=
-		      (ah->curchan->channelFlags & (CHANNEL_2GHZ |
-						    CHANNEL_5GHZ));
-	mode_diff = (chan->chanmode != ah->curchan->chanmode);
+
+	if (pCap->hw_caps & ATH9K_HW_CAP_FCC_BAND_SWITCH) {
+		u32 cur = ah->curchan->channelFlags & (CHANNEL_2GHZ | CHANNEL_5GHZ);
+		u32 new = chan->channelFlags & (CHANNEL_2GHZ | CHANNEL_5GHZ);
+		band_switch = (cur != new);
+		mode_diff = (chan->chanmode != ah->curchan->chanmode);
+	}
 
 	for (qnum = 0; qnum < AR_NUM_QCU; qnum++) {
 		if (ath9k_hw_numtxpending(ah, qnum)) {
@@ -1520,11 +1520,12 @@ static bool ath9k_hw_channel_change(stru
 		return false;
 	}
 
-	if (edma && (band_switch || mode_diff)) {
+	if (band_switch || mode_diff) {
 		ath9k_hw_mark_phy_inactive(ah);
 		udelay(5);
 
-		ath9k_hw_init_pll(ah, NULL);
+		if (band_switch)
+			ath9k_hw_init_pll(ah, chan);
 
 		if (ath9k_hw_fast_chan_change(ah, chan, &ini_reloaded)) {
 			ath_err(common, "Failed to do fast channel change\n");
@@ -1541,22 +1542,21 @@ static bool ath9k_hw_channel_change(stru
 	}
 	ath9k_hw_set_clockrate(ah);
 	ath9k_hw_apply_txpower(ah, chan, false);
-	ath9k_hw_rfbus_done(ah);
 
 	if (IS_CHAN_OFDM(chan) || IS_CHAN_HT(chan))
 		ath9k_hw_set_delta_slope(ah, chan);
 
 	ath9k_hw_spur_mitigate_freq(ah, chan);
 
-	if (edma && (band_switch || mode_diff)) {
-		ah->ah_flags |= AH_FASTCC;
-		if (band_switch || ini_reloaded)
-			ah->eep_ops->set_board_values(ah, chan);
+	if (band_switch || ini_reloaded)
+		ah->eep_ops->set_board_values(ah, chan);
 
-		ath9k_hw_init_bb(ah, chan);
+	ath9k_hw_init_bb(ah, chan);
+	ath9k_hw_rfbus_done(ah);
 
-		if (band_switch || ini_reloaded)
-			ath9k_hw_init_cal(ah, chan);
+	if (band_switch || ini_reloaded) {
+		ah->ah_flags |= AH_FASTCC;
+		ath9k_hw_init_cal(ah, chan);
 		ah->ah_flags &= ~AH_FASTCC;
 	}
 
@@ -1778,16 +1778,11 @@ static void ath9k_hw_init_desc(struct at
 /*
  * Fast channel change:
  * (Change synthesizer based on channel freq without resetting chip)
- *
- * Don't do FCC when
- *   - Flag is not set
- *   - Chip is just coming out of full sleep
- *   - Channel to be set is same as current channel
- *   - Channel flags are different, (eg.,moving from 2GHz to 5GHz channel)
  */
 static int ath9k_hw_do_fastcc(struct ath_hw *ah, struct ath9k_channel *chan)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	int ret;
 
 	if (AR_SREV_9280(ah) && common->bus_ops->ath_bus_type == ATH_PCI)
@@ -1806,9 +1801,21 @@ static int ath9k_hw_do_fastcc(struct ath
 	    (CHANNEL_HALF | CHANNEL_QUARTER))
 		goto fail;
 
-	if ((chan->channelFlags & CHANNEL_ALL) !=
-	    (ah->curchan->channelFlags & CHANNEL_ALL))
-		goto fail;
+	/*
+	 * If cross-band fcc is not supoprted, bail out if
+	 * either channelFlags or chanmode differ.
+	 *
+	 * chanmode will be different if the HT operating mode
+	 * changes because of CSA.
+	 */
+	if (!(pCap->hw_caps & ATH9K_HW_CAP_FCC_BAND_SWITCH)) {
+		if ((chan->channelFlags & CHANNEL_ALL) !=
+		    (ah->curchan->channelFlags & CHANNEL_ALL))
+			goto fail;
+
+		if (chan->chanmode != ah->curchan->chanmode)
+			goto fail;
+	}
 
 	if (!ath9k_hw_check_alive(ah))
 		goto fail;
@@ -2047,7 +2054,7 @@ int ath9k_hw_reset(struct ath_hw *ah, st
 
 	ath9k_hw_apply_gpio_override(ah);
 
-	if (AR_SREV_9565(ah) && ah->shared_chain_lnadiv)
+	if (AR_SREV_9565(ah) && common->bt_ant_diversity)
 		REG_SET_BIT(ah, AR_BTCOEX_WL_LNADIV, AR_BTCOEX_WL_LNADIV_FORCE_ON);
 
 	return 0;
@@ -2550,34 +2557,28 @@ int ath9k_hw_fill_cap_info(struct ath_hw
 	if (AR_SREV_9287_11_OR_LATER(ah) || AR_SREV_9271(ah))
 		pCap->hw_caps |= ATH9K_HW_CAP_SGI_20;
 
-	if (AR_SREV_9285(ah))
+	if (AR_SREV_9285(ah)) {
 		if (ah->eep_ops->get_eeprom(ah, EEP_MODAL_VER) >= 3) {
 			ant_div_ctl1 =
 				ah->eep_ops->get_eeprom(ah, EEP_ANT_DIV_CTL1);
-			if ((ant_div_ctl1 & 0x1) && ((ant_div_ctl1 >> 3) & 0x1))
+			if ((ant_div_ctl1 & 0x1) && ((ant_div_ctl1 >> 3) & 0x1)) {
 				pCap->hw_caps |= ATH9K_HW_CAP_ANT_DIV_COMB;
+				ath_info(common, "Enable LNA combining\n");
+			}
 		}
+	}
+
 	if (AR_SREV_9300_20_OR_LATER(ah)) {
 		if (ah->eep_ops->get_eeprom(ah, EEP_CHAIN_MASK_REDUCE))
 			pCap->hw_caps |= ATH9K_HW_CAP_APM;
 	}
 
-
 	if (AR_SREV_9330(ah) || AR_SREV_9485(ah) || AR_SREV_9565(ah)) {
 		ant_div_ctl1 = ah->eep_ops->get_eeprom(ah, EEP_ANT_DIV_CTL1);
-		/*
-		 * enable the diversity-combining algorithm only when
-		 * both enable_lna_div and enable_fast_div are set
-		 *		Table for Diversity
-		 * ant_div_alt_lnaconf		bit 0-1
-		 * ant_div_main_lnaconf		bit 2-3
-		 * ant_div_alt_gaintb		bit 4
-		 * ant_div_main_gaintb		bit 5
-		 * enable_ant_div_lnadiv	bit 6
-		 * enable_ant_fast_div		bit 7
-		 */
-		if ((ant_div_ctl1 >> 0x6) == 0x3)
+		if ((ant_div_ctl1 >> 0x6) == 0x3) {
 			pCap->hw_caps |= ATH9K_HW_CAP_ANT_DIV_COMB;
+			ath_info(common, "Enable LNA combining\n");
+		}
 	}
 
 	if (ath9k_hw_dfs_tested(ah))
@@ -2610,6 +2611,13 @@ int ath9k_hw_fill_cap_info(struct ath_hw
 	    ah->eep_ops->get_eeprom(ah, EEP_PAPRD))
 			pCap->hw_caps |= ATH9K_HW_CAP_PAPRD;
 
+	/*
+	 * Fast channel change across bands is available
+	 * only for AR9462 and AR9565.
+	 */
+	if (AR_SREV_9462(ah) || AR_SREV_9565(ah))
+		pCap->hw_caps |= ATH9K_HW_CAP_FCC_BAND_SWITCH;
+
 	return 0;
 }
 
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -247,6 +247,8 @@ enum ath9k_hw_caps {
 	ATH9K_HW_CAP_DFS			= BIT(16),
 	ATH9K_HW_WOW_DEVICE_CAPABLE		= BIT(17),
 	ATH9K_HW_CAP_PAPRD			= BIT(18),
+	ATH9K_HW_CAP_FCC_BAND_SWITCH		= BIT(19),
+	ATH9K_HW_CAP_BT_ANT_DIV			= BIT(20),
 };
 
 /*
@@ -309,8 +311,11 @@ struct ath9k_ops_config {
 	u16 ani_poll_interval; /* ANI poll interval in ms */
 
 	/* Platform specific config */
+	u32 aspm_l1_fix;
 	u32 xlna_gpio;
+	u32 ant_ctrl_comm2g_switch_enable;
 	bool xatten_margin_cfg;
+	bool alt_mingainidx;
 };
 
 enum ath9k_int {
@@ -716,11 +721,14 @@ struct ath_hw_ops {
 			struct ath_hw_antcomb_conf *antconf);
 	void (*antdiv_comb_conf_set)(struct ath_hw *ah,
 			struct ath_hw_antcomb_conf *antconf);
-	void (*antctrl_shared_chain_lnadiv)(struct ath_hw *hw, bool enable);
 	void (*spectral_scan_config)(struct ath_hw *ah,
 				     struct ath_spec_scan *param);
 	void (*spectral_scan_trigger)(struct ath_hw *ah);
 	void (*spectral_scan_wait)(struct ath_hw *ah);
+
+#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
+	void (*set_bt_ant_diversity)(struct ath_hw *hw, bool enable);
+#endif
 };
 
 struct ath_nf_limits {
@@ -765,7 +773,6 @@ struct ath_hw {
 	bool aspm_enabled;
 	bool is_monitoring;
 	bool need_an_top2_fixup;
-	bool shared_chain_lnadiv;
 	u16 tx_trig_level;
 
 	u32 nf_regs[6];
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -29,6 +29,60 @@ static DEFINE_PCI_DEVICE_TABLE(ath_pci_i
 	{ PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI   */
 	{ PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI   */
 	{ PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
+
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 PCI_VENDOR_ID_AZWAVE,
+			 0x1C71),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 PCI_VENDOR_ID_FOXCONN,
+			 0xE01F),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 0x11AD, /* LITEON */
+			 0x6632),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 0x11AD, /* LITEON */
+			 0x6642),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 PCI_VENDOR_ID_QMI,
+			 0x0306),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 0x185F, /* WNC */
+			 0x309D),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 0x10CF, /* Fujitsu */
+			 0x147C),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 0x10CF, /* Fujitsu */
+			 0x147D),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002A,
+			 0x10CF, /* Fujitsu */
+			 0x1536),
+	  .driver_data = ATH9K_PCI_D3_L1_WAR },
+
+	/* AR9285 card for Asus */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x002B,
+			 PCI_VENDOR_ID_AZWAVE,
+			 0x2C37),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+
 	{ PCI_VDEVICE(ATHEROS, 0x002B) }, /* PCI-E */
 	{ PCI_VDEVICE(ATHEROS, 0x002C) }, /* PCI-E 802.11n bonded out */
 	{ PCI_VDEVICE(ATHEROS, 0x002D) }, /* PCI   */
@@ -40,29 +94,106 @@ static DEFINE_PCI_DEVICE_TABLE(ath_pci_i
 			 0x0032,
 			 PCI_VENDOR_ID_AZWAVE,
 			 0x2086),
-	  .driver_data = ATH9K_PCI_CUS198 },
+	  .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 			 0x0032,
 			 PCI_VENDOR_ID_AZWAVE,
 			 0x1237),
-	  .driver_data = ATH9K_PCI_CUS198 },
+	  .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 			 0x0032,
 			 PCI_VENDOR_ID_AZWAVE,
 			 0x2126),
-	  .driver_data = ATH9K_PCI_CUS198 },
+	  .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_AZWAVE,
+			 0x126A),
+	  .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
 
 	/* PCI-E CUS230 */
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 			 0x0032,
 			 PCI_VENDOR_ID_AZWAVE,
 			 0x2152),
-	  .driver_data = ATH9K_PCI_CUS230 },
+	  .driver_data = ATH9K_PCI_CUS230 | ATH9K_PCI_BT_ANT_DIV },
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 			 0x0032,
 			 PCI_VENDOR_ID_FOXCONN,
 			 0xE075),
-	  .driver_data = ATH9K_PCI_CUS230 },
+	  .driver_data = ATH9K_PCI_CUS230 | ATH9K_PCI_BT_ANT_DIV },
+
+	/* WB225 */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_ATHEROS,
+			 0x3119),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_ATHEROS,
+			 0x3122),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 0x185F, /* WNC */
+			 0x3119),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 0x185F, /* WNC */
+			 0x3027),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0x4105),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0x4106),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0x410D),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0x410E),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0x410F),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0xC706),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0xC680),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_SAMSUNG,
+			 0xC708),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_LENOVO,
+			 0x3218),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
+			 0x0032,
+			 PCI_VENDOR_ID_LENOVO,
+			 0x3219),
+	  .driver_data = ATH9K_PCI_BT_ANT_DIV },
 
 	{ PCI_VDEVICE(ATHEROS, 0x0032) }, /* PCI-E  AR9485 */
 	{ PCI_VDEVICE(ATHEROS, 0x0033) }, /* PCI-E  AR9580 */
@@ -229,6 +360,22 @@ static void ath_pci_aspm_init(struct ath
 		return;
 	}
 
+	/*
+	 * 0x70c - Ack Frequency Register.
+	 *
+	 * Bits 27:29 - DEFAULT_L1_ENTRANCE_LATENCY.
+	 *
+	 * 000 : 1 us
+	 * 001 : 2 us
+	 * 010 : 4 us
+	 * 011 : 8 us
+	 * 100 : 16 us
+	 * 101 : 32 us
+	 * 110/111 : 64 us
+	 */
+	if (AR_SREV_9462(ah))
+		pci_read_config_dword(pdev, 0x70c, &ah->config.aspm_l1_fix);
+
 	pcie_capability_read_word(parent, PCI_EXP_LNKCTL, &aspm);
 	if (aspm & (PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1)) {
 		ah->aspm_enabled = true;
--- a/drivers/net/wireless/ath/ath9k/phy.h
+++ b/drivers/net/wireless/ath/ath9k/phy.h
@@ -48,4 +48,11 @@
 #define AR_PHY_PLL_CONTROL 0x16180
 #define AR_PHY_PLL_MODE 0x16184
 
+enum ath9k_ant_div_comb_lna_conf {
+	ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2,
+	ATH_ANT_DIV_COMB_LNA2,
+	ATH_ANT_DIV_COMB_LNA1,
+	ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2,
+};
+
 #endif
--- a/drivers/net/wireless/iwlwifi/mvm/time-event.c
+++ b/drivers/net/wireless/iwlwifi/mvm/time-event.c
@@ -73,7 +73,6 @@
 #include "iwl-prph.h"
 
 /* A TimeUnit is 1024 microsecond */
-#define TU_TO_JIFFIES(_tu)	(usecs_to_jiffies((_tu) * 1024))
 #define MSEC_TO_TU(_msec)	(_msec*1000/1024)
 
 /*
@@ -191,8 +190,7 @@ static void iwl_mvm_te_handle_notif(stru
 		iwl_mvm_te_clear_data(mvm, te_data);
 	} else if (le32_to_cpu(notif->action) & TE_NOTIF_HOST_EVENT_START) {
 		te_data->running = true;
-		te_data->end_jiffies = jiffies +
-			TU_TO_JIFFIES(te_data->duration);
+		te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
 
 		if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 			set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
@@ -329,8 +327,7 @@ void iwl_mvm_protect_session(struct iwl_
 	lockdep_assert_held(&mvm->mutex);
 
 	if (te_data->running &&
-	    time_after(te_data->end_jiffies,
-		       jiffies + TU_TO_JIFFIES(min_duration))) {
+	    time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
 		IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
 			     jiffies_to_msecs(te_data->end_jiffies - jiffies));
 		return;
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -2279,4 +2279,8 @@ static inline bool ieee80211_check_tim(c
 	return !!(tim->virtual_map[index] & mask);
 }
 
+/* convert time units */
+#define TU_TO_JIFFIES(x)	(usecs_to_jiffies((x) * 1024))
+#define TU_TO_EXP_TIME(x)	(jiffies + TU_TO_JIFFIES(x))
+
 #endif /* LINUX_IEEE80211_H */
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -210,7 +210,7 @@ static bool rc_no_data_or_no_ack_use_min
 		!ieee80211_is_data(fc);
 }
 
-static void rc_send_low_broadcast(s8 *idx, u32 basic_rates,
+static void rc_send_low_basicrate(s8 *idx, u32 basic_rates,
 				  struct ieee80211_supported_band *sband)
 {
 	u8 i;
@@ -272,28 +272,37 @@ static void __rate_control_send_low(stru
 }
 
 
-bool rate_control_send_low(struct ieee80211_sta *sta,
+bool rate_control_send_low(struct ieee80211_sta *pubsta,
 			   void *priv_sta,
 			   struct ieee80211_tx_rate_control *txrc)
 {
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
 	struct ieee80211_supported_band *sband = txrc->sband;
+	struct sta_info *sta;
 	int mcast_rate;
+	bool use_basicrate = false;
 
-	if (!sta || !priv_sta || rc_no_data_or_no_ack_use_min(txrc)) {
-		__rate_control_send_low(txrc->hw, sband, sta, info);
+	if (!pubsta || !priv_sta || rc_no_data_or_no_ack_use_min(txrc)) {
+		__rate_control_send_low(txrc->hw, sband, pubsta, info);
 
-		if (!sta && txrc->bss) {
+		if (!pubsta && txrc->bss) {
 			mcast_rate = txrc->bss_conf->mcast_rate[sband->band];
 			if (mcast_rate > 0) {
 				info->control.rates[0].idx = mcast_rate - 1;
 				return true;
 			}
+			use_basicrate = true;
+		} else if (pubsta) {
+			sta = container_of(pubsta, struct sta_info, sta);
+			if (ieee80211_vif_is_mesh(&sta->sdata->vif))
+				use_basicrate = true;
+		}
 
-			rc_send_low_broadcast(&info->control.rates[0].idx,
+		if (use_basicrate)
+			rc_send_low_basicrate(&info->control.rates[0].idx,
 					      txrc->bss_conf->basic_rates,
 					      sband);
-		}
+
 		return true;
 	}
 	return false;
--- a/drivers/net/wireless/ath/ath9k/Kconfig
+++ b/drivers/net/wireless/ath/ath9k/Kconfig
@@ -60,7 +60,7 @@ config ATH9K_AHB
 
 config ATH9K_DEBUGFS
 	bool "Atheros ath9k debugging"
-	depends on ATH9K
+	depends on ATH9K && DEBUG_FS
 	select MAC80211_DEBUGFS
 	depends on RELAY
 	---help---
--- a/drivers/net/wireless/ath/ath9k/ar9002_hw.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_hw.c
@@ -269,13 +269,12 @@ static void ar9002_hw_configpcipowersave
 			if (ah->config.pcie_waen & AR_WA_D3_L1_DISABLE)
 				val |= AR_WA_D3_L1_DISABLE;
 		} else {
-			if (((AR_SREV_9285(ah) ||
-			      AR_SREV_9271(ah) ||
-			      AR_SREV_9287(ah)) &&
-			     (AR9285_WA_DEFAULT & AR_WA_D3_L1_DISABLE)) ||
-			    (AR_SREV_9280(ah) &&
-			     (AR9280_WA_DEFAULT & AR_WA_D3_L1_DISABLE))) {
-				val |= AR_WA_D3_L1_DISABLE;
+			if (AR_SREV_9285(ah) || AR_SREV_9271(ah) || AR_SREV_9287(ah)) {
+				if (AR9285_WA_DEFAULT & AR_WA_D3_L1_DISABLE)
+					val |= AR_WA_D3_L1_DISABLE;
+			} else if (AR_SREV_9280(ah)) {
+				if (AR9280_WA_DEFAULT & AR_WA_D3_L1_DISABLE)
+					val |= AR_WA_D3_L1_DISABLE;
 			}
 		}
 
@@ -297,24 +296,18 @@ static void ar9002_hw_configpcipowersave
 	} else {
 		if (ah->config.pcie_waen) {
 			val = ah->config.pcie_waen;
-			if (!power_off)
-				val &= (~AR_WA_D3_L1_DISABLE);
+			val &= (~AR_WA_D3_L1_DISABLE);
 		} else {
-			if (AR_SREV_9285(ah) ||
-			    AR_SREV_9271(ah) ||
-			    AR_SREV_9287(ah)) {
+			if (AR_SREV_9285(ah) || AR_SREV_9271(ah) || AR_SREV_9287(ah)) {
 				val = AR9285_WA_DEFAULT;
-				if (!power_off)
-					val &= (~AR_WA_D3_L1_DISABLE);
-			}
-			else if (AR_SREV_9280(ah)) {
+				val &= (~AR_WA_D3_L1_DISABLE);
+			} else if (AR_SREV_9280(ah)) {
 				/*
 				 * For AR9280 chips, bit 22 of 0x4004
 				 * needs to be set.
 				 */
 				val = AR9280_WA_DEFAULT;
-				if (!power_off)
-					val &= (~AR_WA_D3_L1_DISABLE);
+				val &= (~AR_WA_D3_L1_DISABLE);
 			} else {
 				val = AR_WA_DEFAULT;
 			}
--- a/drivers/net/wireless/ath/ath9k/ar9003_hw.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_hw.c
@@ -153,7 +153,7 @@ static void ar9003_hw_init_mode_regs(str
 		if (!ah->is_clk_25mhz)
 			INIT_INI_ARRAY(&ah->iniAdditional,
 				       ar9340_1p0_radio_core_40M);
-	} else if (AR_SREV_9485_11(ah)) {
+	} else if (AR_SREV_9485_11_OR_LATER(ah)) {
 		/* mac */
 		INIT_INI_ARRAY(&ah->iniMac[ATH_INI_CORE],
 				ar9485_1_1_mac_core);
@@ -424,7 +424,7 @@ static void ar9003_tx_gain_table_mode0(s
 	else if (AR_SREV_9340(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9340Modes_lowest_ob_db_tx_gain_table_1p0);
-	else if (AR_SREV_9485_11(ah))
+	else if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9485_modes_lowest_ob_db_tx_gain_1_1);
 	else if (AR_SREV_9550(ah))
@@ -458,7 +458,7 @@ static void ar9003_tx_gain_table_mode1(s
 	else if (AR_SREV_9340(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9340Modes_high_ob_db_tx_gain_table_1p0);
-	else if (AR_SREV_9485_11(ah))
+	else if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9485Modes_high_ob_db_tx_gain_1_1);
 	else if (AR_SREV_9580(ah))
@@ -492,7 +492,7 @@ static void ar9003_tx_gain_table_mode2(s
 	else if (AR_SREV_9340(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9340Modes_low_ob_db_tx_gain_table_1p0);
-	else if (AR_SREV_9485_11(ah))
+	else if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9485Modes_low_ob_db_tx_gain_1_1);
 	else if (AR_SREV_9580(ah))
@@ -517,7 +517,7 @@ static void ar9003_tx_gain_table_mode3(s
 	else if (AR_SREV_9340(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9340Modes_high_power_tx_gain_table_1p0);
-	else if (AR_SREV_9485_11(ah))
+	else if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9485Modes_high_power_tx_gain_1_1);
 	else if (AR_SREV_9580(ah))
@@ -552,7 +552,7 @@ static void ar9003_tx_gain_table_mode4(s
 
 static void ar9003_tx_gain_table_mode5(struct ath_hw *ah)
 {
-	if (AR_SREV_9485_11(ah))
+	if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9485Modes_green_ob_db_tx_gain_1_1);
 	else if (AR_SREV_9340(ah))
@@ -571,7 +571,7 @@ static void ar9003_tx_gain_table_mode6(s
 	if (AR_SREV_9340(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9340Modes_low_ob_db_and_spur_tx_gain_table_1p0);
-	else if (AR_SREV_9485_11(ah))
+	else if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesTxGain,
 			ar9485Modes_green_spur_ob_db_tx_gain_1_1);
 	else if (AR_SREV_9580(ah))
@@ -611,7 +611,7 @@ static void ar9003_rx_gain_table_mode0(s
 	else if (AR_SREV_9340(ah))
 		INIT_INI_ARRAY(&ah->iniModesRxGain,
 				ar9340Common_rx_gain_table_1p0);
-	else if (AR_SREV_9485_11(ah))
+	else if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesRxGain,
 			       ar9485_common_rx_gain_1_1);
 	else if (AR_SREV_9550(ah)) {
@@ -644,7 +644,7 @@ static void ar9003_rx_gain_table_mode1(s
 	else if (AR_SREV_9340(ah))
 		INIT_INI_ARRAY(&ah->iniModesRxGain,
 			ar9340Common_wo_xlna_rx_gain_table_1p0);
-	else if (AR_SREV_9485_11(ah))
+	else if (AR_SREV_9485_11_OR_LATER(ah))
 		INIT_INI_ARRAY(&ah->iniModesRxGain,
 			ar9485Common_wo_xlna_rx_gain_1_1);
 	else if (AR_SREV_9462_21(ah))
@@ -745,16 +745,25 @@ static void ar9003_hw_init_mode_gain_reg
 static void ar9003_hw_configpcipowersave(struct ath_hw *ah,
 					 bool power_off)
 {
+	/*
+	 * Increase L1 Entry Latency. Some WB222 boards don't have
+	 * this change in eeprom/OTP.
+	 *
+	 */
+	if (AR_SREV_9462(ah)) {
+		u32 val = ah->config.aspm_l1_fix;
+		if ((val & 0xff000000) == 0x17000000) {
+			val &= 0x00ffffff;
+			val |= 0x27000000;
+			REG_WRITE(ah, 0x570c, val);
+		}
+	}
+
 	/* Nothing to do on restore for 11N */
 	if (!power_off /* !restore */) {
 		/* set bit 19 to allow forcing of pcie core into L1 state */
 		REG_SET_BIT(ah, AR_PCIE_PM_CTRL, AR_PCIE_PM_CTRL_ENA);
-
-		/* Several PCIe massages to ensure proper behaviour */
-		if (ah->config.pcie_waen)
-			REG_WRITE(ah, AR_WA, ah->config.pcie_waen);
-		else
-			REG_WRITE(ah, AR_WA, ah->WARegVal);
+		REG_WRITE(ah, AR_WA, ah->WARegVal);
 	}
 
 	/*
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -491,6 +491,7 @@ int ath9k_hw_process_rxdesc_edma(struct 
 	rxs->rs_rate = MS(rxsp->status1, AR_RxRate);
 	rxs->rs_more = (rxsp->status2 & AR_RxMore) ? 1 : 0;
 
+	rxs->rs_firstaggr = (rxsp->status11 & AR_RxFirstAggr) ? 1 : 0;
 	rxs->rs_isaggr = (rxsp->status11 & AR_RxAggr) ? 1 : 0;
 	rxs->rs_moreaggr = (rxsp->status11 & AR_RxMoreAggr) ? 1 : 0;
 	rxs->rs_antenna = (MS(rxsp->status4, AR_RxAntenna) & 0x7);
--- a/drivers/net/wireless/ath/ath9k/common.c
+++ b/drivers/net/wireless/ath/ath9k/common.c
@@ -49,37 +49,40 @@ int ath9k_cmn_get_hw_crypto_keytype(stru
 }
 EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype);
 
-static u32 ath9k_get_extchanmode(struct ieee80211_channel *chan,
-				 enum nl80211_channel_type channel_type)
+static u32 ath9k_get_extchanmode(struct cfg80211_chan_def *chandef)
 {
 	u32 chanmode = 0;
 
-	switch (chan->band) {
+	switch (chandef->chan->band) {
 	case IEEE80211_BAND_2GHZ:
-		switch (channel_type) {
-		case NL80211_CHAN_NO_HT:
-		case NL80211_CHAN_HT20:
+		switch (chandef->width) {
+		case NL80211_CHAN_WIDTH_20_NOHT:
+		case NL80211_CHAN_WIDTH_20:
 			chanmode = CHANNEL_G_HT20;
 			break;
-		case NL80211_CHAN_HT40PLUS:
-			chanmode = CHANNEL_G_HT40PLUS;
+		case NL80211_CHAN_WIDTH_40:
+			if (chandef->center_freq1 > chandef->chan->center_freq)
+				chanmode = CHANNEL_G_HT40PLUS;
+			else
+				chanmode = CHANNEL_G_HT40MINUS;
 			break;
-		case NL80211_CHAN_HT40MINUS:
-			chanmode = CHANNEL_G_HT40MINUS;
+		default:
 			break;
 		}
 		break;
 	case IEEE80211_BAND_5GHZ:
-		switch (channel_type) {
-		case NL80211_CHAN_NO_HT:
-		case NL80211_CHAN_HT20:
+		switch (chandef->width) {
+		case NL80211_CHAN_WIDTH_20_NOHT:
+		case NL80211_CHAN_WIDTH_20:
 			chanmode = CHANNEL_A_HT20;
 			break;
-		case NL80211_CHAN_HT40PLUS:
-			chanmode = CHANNEL_A_HT40PLUS;
+		case NL80211_CHAN_WIDTH_40:
+			if (chandef->center_freq1 > chandef->chan->center_freq)
+				chanmode = CHANNEL_A_HT40PLUS;
+			else
+				chanmode = CHANNEL_A_HT40MINUS;
 			break;
-		case NL80211_CHAN_HT40MINUS:
-			chanmode = CHANNEL_A_HT40MINUS;
+		default:
 			break;
 		}
 		break;
@@ -94,13 +97,12 @@ static u32 ath9k_get_extchanmode(struct 
  * Update internal channel flags.
  */
 void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
-			       struct ieee80211_channel *chan,
-			       enum nl80211_channel_type channel_type)
+			       struct cfg80211_chan_def *chandef)
 {
-	ichan->channel = chan->center_freq;
-	ichan->chan = chan;
+	ichan->channel = chandef->chan->center_freq;
+	ichan->chan = chandef->chan;
 
-	if (chan->band == IEEE80211_BAND_2GHZ) {
+	if (chandef->chan->band == IEEE80211_BAND_2GHZ) {
 		ichan->chanmode = CHANNEL_G;
 		ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM;
 	} else {
@@ -108,8 +110,22 @@ void ath9k_cmn_update_ichannel(struct at
 		ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
 	}
 
-	if (channel_type != NL80211_CHAN_NO_HT)
-		ichan->chanmode = ath9k_get_extchanmode(chan, channel_type);
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_5:
+		ichan->channelFlags |= CHANNEL_QUARTER;
+		break;
+	case NL80211_CHAN_WIDTH_10:
+		ichan->channelFlags |= CHANNEL_HALF;
+		break;
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		break;
+	case NL80211_CHAN_WIDTH_20:
+	case NL80211_CHAN_WIDTH_40:
+		ichan->chanmode = ath9k_get_extchanmode(chandef);
+		break;
+	default:
+		WARN_ON(1);
+	}
 }
 EXPORT_SYMBOL(ath9k_cmn_update_ichannel);
 
@@ -125,8 +141,7 @@ struct ath9k_channel *ath9k_cmn_get_curc
 
 	chan_idx = curchan->hw_value;
 	channel = &ah->channels[chan_idx];
-	ath9k_cmn_update_ichannel(channel, curchan,
-				  cfg80211_get_chandef_type(&hw->conf.chandef));
+	ath9k_cmn_update_ichannel(channel, &hw->conf.chandef);
 
 	return channel;
 }
--- a/drivers/net/wireless/ath/ath9k/common.h
+++ b/drivers/net/wireless/ath/ath9k/common.h
@@ -44,8 +44,7 @@
 
 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
 void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
-			       struct ieee80211_channel *chan,
-			       enum nl80211_channel_type channel_type);
+			       struct cfg80211_chan_def *chandef);
 struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
 					       struct ath_hw *ah);
 int ath9k_cmn_count_streams(unsigned int chainmask, int max);
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -115,10 +115,10 @@ static int hif_usb_send_regout(struct hi
 	cmd->skb = skb;
 	cmd->hif_dev = hif_dev;
 
-	usb_fill_bulk_urb(urb, hif_dev->udev,
-			 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
+	usb_fill_int_urb(urb, hif_dev->udev,
+			 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
 			 skb->data, skb->len,
-			 hif_usb_regout_cb, cmd);
+			 hif_usb_regout_cb, cmd, 1);
 
 	usb_anchor_urb(urb, &hif_dev->regout_submitted);
 	ret = usb_submit_urb(urb, GFP_KERNEL);
@@ -723,11 +723,11 @@ static void ath9k_hif_usb_reg_in_cb(stru
 			return;
 		}
 
-		usb_fill_bulk_urb(urb, hif_dev->udev,
-				 usb_rcvbulkpipe(hif_dev->udev,
+		usb_fill_int_urb(urb, hif_dev->udev,
+				 usb_rcvintpipe(hif_dev->udev,
 						 USB_REG_IN_PIPE),
 				 nskb->data, MAX_REG_IN_BUF_SIZE,
-				 ath9k_hif_usb_reg_in_cb, nskb);
+				 ath9k_hif_usb_reg_in_cb, nskb, 1);
 	}
 
 resubmit:
@@ -909,11 +909,11 @@ static int ath9k_hif_usb_alloc_reg_in_ur
 			goto err_skb;
 		}
 
-		usb_fill_bulk_urb(urb, hif_dev->udev,
-				  usb_rcvbulkpipe(hif_dev->udev,
+		usb_fill_int_urb(urb, hif_dev->udev,
+				  usb_rcvintpipe(hif_dev->udev,
 						  USB_REG_IN_PIPE),
 				  skb->data, MAX_REG_IN_BUF_SIZE,
-				  ath9k_hif_usb_reg_in_cb, skb);
+				  ath9k_hif_usb_reg_in_cb, skb, 1);
 
 		/* Anchor URB */
 		usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
@@ -1031,9 +1031,7 @@ static int ath9k_hif_usb_download_fw(str
 
 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
 {
-	struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
-	struct usb_endpoint_descriptor *endp;
-	int ret, idx;
+	int ret;
 
 	ret = ath9k_hif_usb_download_fw(hif_dev);
 	if (ret) {
@@ -1043,20 +1041,6 @@ static int ath9k_hif_usb_dev_init(struct
 		return ret;
 	}
 
-	/* On downloading the firmware to the target, the USB descriptor of EP4
-	 * is 'patched' to change the type of the endpoint to Bulk. This will
-	 * bring down CPU usage during the scan period.
-	 */
-	for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
-		endp = &alt->endpoint[idx].desc;
-		if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
-				== USB_ENDPOINT_XFER_INT) {
-			endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
-			endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
-			endp->bInterval = 0;
-		}
-	}
-
 	/* Alloc URBs */
 	ret = ath9k_hif_usb_alloc_urbs(hif_dev);
 	if (ret) {
@@ -1268,7 +1252,7 @@ static void ath9k_hif_usb_reboot(struct 
 	if (!buf)
 		return;
 
-	ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
+	ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
 			   buf, 4, NULL, HZ);
 	if (ret)
 		dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -1203,16 +1203,13 @@ static int ath9k_htc_config(struct ieee8
 
 	if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || chip_reset) {
 		struct ieee80211_channel *curchan = hw->conf.chandef.chan;
-		enum nl80211_channel_type channel_type =
-			cfg80211_get_chandef_type(&hw->conf.chandef);
 		int pos = curchan->hw_value;
 
 		ath_dbg(common, CONFIG, "Set channel: %d MHz\n",
 			curchan->center_freq);
 
 		ath9k_cmn_update_ichannel(&priv->ah->channels[pos],
-					  hw->conf.chandef.chan,
-					  channel_type);
+					  &hw->conf.chandef);
 
 		if (ath9k_htc_set_channel(priv, hw, &priv->ah->channels[pos]) < 0) {
 			ath_err(common, "Unable to set channel\n");
--- a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
@@ -448,6 +448,7 @@ static void ath9k_htc_tx_process(struct 
 	struct ieee80211_conf *cur_conf = &priv->hw->conf;
 	bool txok;
 	int slot;
+	int hdrlen, padsize;
 
 	slot = strip_drv_header(priv, skb);
 	if (slot < 0) {
@@ -504,6 +505,15 @@ send_mac80211:
 
 	ath9k_htc_tx_clear_slot(priv, slot);
 
+	/* Remove padding before handing frame back to mac80211 */
+	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
+
+	padsize = hdrlen & 3;
+	if (padsize && skb->len > hdrlen + padsize) {
+		memmove(skb->data + padsize, skb->data, hdrlen);
+		skb_pull(skb, padsize);
+	}
+
 	/* Send status to mac80211 */
 	ieee80211_tx_status(priv->hw, skb);
 }
--- a/drivers/net/wireless/ath/ath9k/link.c
+++ b/drivers/net/wireless/ath/ath9k/link.c
@@ -41,7 +41,7 @@ void ath_tx_complete_poll_work(struct wo
 				txq->axq_tx_inprogress = true;
 			}
 		}
-		ath_txq_unlock_complete(sc, txq);
+		ath_txq_unlock(sc, txq);
 	}
 
 	if (needreset) {
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -583,9 +583,9 @@ int ath9k_hw_rxprocdesc(struct ath_hw *a
 	rs->rs_rate = MS(ads.ds_rxstatus0, AR_RxRate);
 	rs->rs_more = (ads.ds_rxstatus1 & AR_RxMore) ? 1 : 0;
 
+	rs->rs_firstaggr = (ads.ds_rxstatus8 & AR_RxFirstAggr) ? 1 : 0;
 	rs->rs_isaggr = (ads.ds_rxstatus8 & AR_RxAggr) ? 1 : 0;
-	rs->rs_moreaggr =
-		(ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
+	rs->rs_moreaggr = (ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
 	rs->rs_antenna = MS(ads.ds_rxstatus3, AR_RxAntenna);
 
 	/* directly mapped flags for ieee80211_rx_status */
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -140,6 +140,7 @@ struct ath_rx_status {
 	int8_t rs_rssi_ext1;
 	int8_t rs_rssi_ext2;
 	u8 rs_isaggr;
+	u8 rs_firstaggr;
 	u8 rs_moreaggr;
 	u8 rs_num_delims;
 	u8 rs_flags;
@@ -569,6 +570,7 @@ struct ar5416_desc {
 #define AR_RxAggr           0x00020000
 #define AR_PostDelimCRCErr  0x00040000
 #define AR_RxStatusRsvd71   0x3ff80000
+#define AR_RxFirstAggr      0x20000000
 #define AR_DecryptBusyErr   0x40000000
 #define AR_KeyMiss          0x80000000
 
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -1324,8 +1324,8 @@ static void ath_rate_update(void *priv, 
 		ath_rc_init(sc, priv_sta);
 
 		ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG,
-			"Operating HT Bandwidth changed to: %d\n",
-			cfg80211_get_chandef_type(&sc->hw->conf.chandef));
+			"Operating Bandwidth changed to: %d\n",
+			sc->hw->conf.chandef.width);
 	}
 }
 
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -893,9 +893,9 @@
 
 #define AR_SREV_9485(_ah) \
 	(((_ah)->hw_version.macVersion == AR_SREV_VERSION_9485))
-#define AR_SREV_9485_11(_ah) \
-	(AR_SREV_9485(_ah) && \
-	 ((_ah)->hw_version.macRev == AR_SREV_REVISION_9485_11))
+#define AR_SREV_9485_11_OR_LATER(_ah) \
+	(((_ah)->hw_version.macVersion == AR_SREV_VERSION_9485) && \
+	 ((_ah)->hw_version.macRev >= AR_SREV_REVISION_9485_11))
 #define AR_SREV_9485_OR_LATER(_ah) \
 	(((_ah)->hw_version.macVersion >= AR_SREV_VERSION_9485))