mac80211: merge a few ad-hoc mode fixes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 37840

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

@@ -1945,7 +1945,21 @@
  
  	/*
  	 * Downgrade the new channel if we associated with restricted
-@@ -3394,10 +3405,13 @@ static int ieee80211_probe_auth(struct i
+@@ -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);
+@@ -3394,10 +3412,13 @@ static int ieee80211_probe_auth(struct i
  
  	if (tx_flags == 0) {
  		auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
@@ -1961,7 +1975,7 @@
  	}
  
  	return 0;
-@@ -3434,7 +3448,11 @@ static int ieee80211_do_assoc(struct iee
+@@ -3434,7 +3455,11 @@ static int ieee80211_do_assoc(struct iee
  		assoc_data->timeout_started = true;
  		run_again(sdata, assoc_data->timeout);
  	} else {
@@ -1974,7 +1988,7 @@
  	}
  
  	return 0;
-@@ -3829,7 +3847,7 @@ static int ieee80211_prep_channel(struct
+@@ -3829,7 +3854,7 @@ static int ieee80211_prep_channel(struct
  	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
  						     cbss->channel,
  						     ht_oper, vht_oper,
@@ -2555,7 +2569,93 @@
  
 --- a/net/mac80211/ibss.c
 +++ b/net/mac80211/ibss.c
-@@ -792,6 +792,17 @@ static void ieee80211_sta_find_ibss(stru
+@@ -36,7 +36,7 @@
+ 
+ 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 +51,7 @@ 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 +82,9 @@ 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 +262,12 @@ 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 +275,26 @@ 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 +319,7 @@ 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);
+@@ -736,7 +761,7 @@ 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 +817,17 @@ static void ieee80211_sta_find_ibss(stru
  		return;
  	}
  
@@ -2573,6 +2673,14 @@
  	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 +1174,7 @@ 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
 @@ -1173,6 +1173,10 @@ skip_ws_det: