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ath9k: fix a null pointer deref issue in the powersave fixes 

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36828 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Felix Fietkau 2013-06-03 20:58:28 +00:00
parent d3cb5e8ecb
commit 2b9432a431
1 changed files with 28 additions and 24 deletions
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52
package/mac80211/patches/300-pending_work.patch
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@ -4262,7 +4262,7 @@
width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0;
half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0;
@@ -803,24 +790,16 @@ static int ath_compute_num_delims(struct
@@ -803,25 +790,20 @@ static int ath_compute_num_delims(struct
return ndelim;
}
@ -4290,9 +4290,13 @@
- do {
+ while (1) {
skb = skb_peek(&tid->buf_q);
+ if (!skb)
+ break;
+
fi = get_frame_info(skb);
bf = fi->bf;
@@ -837,10 +816,8 @@ static enum ATH_AGGR_STATUS ath_tx_form_
if (!fi->bf)
@@ -837,10 +819,8 @@ static enum ATH_AGGR_STATUS ath_tx_form_
seqno = bf->bf_state.seqno;
/* do not step over block-ack window */
@ -4304,7 +4308,7 @@
if (tid->bar_index > ATH_BA_INDEX(tid->seq_start, seqno)) {
struct ath_tx_status ts = {};
@@ -854,10 +831,45 @@ static enum ATH_AGGR_STATUS ath_tx_form_
@@ -854,10 +834,45 @@ static enum ATH_AGGR_STATUS ath_tx_form_
continue;
}
@ -4350,7 +4354,7 @@
aggr_limit = ath_lookup_rate(sc, bf, tid);
rl = 1;
}
@@ -898,7 +910,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_
@@ -898,7 +913,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_
/* link buffers of this frame to the aggregate */
if (!fi->retries)
@ -4359,7 +4363,7 @@
bf->bf_state.ndelim = ndelim;
__skb_unlink(skb, &tid->buf_q);
@@ -998,14 +1010,14 @@ static void ath_buf_set_rate(struct ath_
@@ -998,14 +1013,14 @@ static void ath_buf_set_rate(struct ath_
skb = bf->bf_mpdu;
tx_info = IEEE80211_SKB_CB(skb);
@ -4376,7 +4380,7 @@
bool is_40, is_sgi, is_sp;
int phy;
@@ -1107,9 +1119,8 @@ static void ath_tx_fill_desc(struct ath_
@@ -1107,9 +1122,8 @@ static void ath_tx_fill_desc(struct ath_
{
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
@ -4387,7 +4391,7 @@
memset(&info, 0, sizeof(info));
info.is_first = true;
@@ -1117,24 +1128,17 @@ static void ath_tx_fill_desc(struct ath_
@@ -1117,24 +1131,17 @@ static void ath_tx_fill_desc(struct ath_
info.txpower = MAX_RATE_POWER;
info.qcu = txq->axq_qnum;
@ -4415,7 +4419,7 @@
info.type = get_hw_packet_type(skb);
if (bf->bf_next)
@@ -1142,6 +1146,21 @@ static void ath_tx_fill_desc(struct ath_
@@ -1142,6 +1149,21 @@ static void ath_tx_fill_desc(struct ath_
else
info.link = 0;
@ -4437,7 +4441,7 @@
info.buf_addr[0] = bf->bf_buf_addr;
info.buf_len[0] = skb->len;
info.pkt_len = fi->framelen;
@@ -1151,7 +1170,7 @@ static void ath_tx_fill_desc(struct ath_
@@ -1151,7 +1173,7 @@ static void ath_tx_fill_desc(struct ath_
if (aggr) {
if (bf == bf_first)
info.aggr = AGGR_BUF_FIRST;
@ -4446,7 +4450,7 @@
info.aggr = AGGR_BUF_LAST;
else
info.aggr = AGGR_BUF_MIDDLE;
@@ -1160,6 +1179,9 @@ static void ath_tx_fill_desc(struct ath_
@@ -1160,6 +1182,9 @@ static void ath_tx_fill_desc(struct ath_
info.aggr_len = len;
}
@ -4456,7 +4460,7 @@
ath9k_hw_set_txdesc(ah, bf->bf_desc, &info);
bf = bf->bf_next;
}
@@ -1224,9 +1246,6 @@ int ath_tx_aggr_start(struct ath_softc *
@@ -1224,9 +1249,6 @@ int ath_tx_aggr_start(struct ath_softc *
an = (struct ath_node *)sta->drv_priv;
txtid = ATH_AN_2_TID(an, tid);
@ -4466,7 +4470,7 @@
/* update ampdu factor/density, they may have changed. This may happen
* in HT IBSS when a beacon with HT-info is received after the station
* has already been added.
@@ -1238,7 +1257,7 @@ int ath_tx_aggr_start(struct ath_softc *
@@ -1238,7 +1260,7 @@ int ath_tx_aggr_start(struct ath_softc *
an->mpdudensity = density;
}
@ -4475,7 +4479,7 @@
txtid->paused = true;
*ssn = txtid->seq_start = txtid->seq_next;
txtid->bar_index = -1;
@@ -1255,28 +1274,9 @@ void ath_tx_aggr_stop(struct ath_softc *
@@ -1255,28 +1277,9 @@ void ath_tx_aggr_stop(struct ath_softc *
struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid);
struct ath_txq *txq = txtid->ac->txq;
@ -4505,7 +4509,7 @@
ath_tx_flush_tid(sc, txtid);
ath_txq_unlock_complete(sc, txq);
}
@@ -1342,18 +1342,92 @@ void ath_tx_aggr_wakeup(struct ath_softc
@@ -1342,18 +1345,92 @@ void ath_tx_aggr_wakeup(struct ath_softc
}
}
@ -4605,7 +4609,7 @@
}
/********************/
@@ -1709,8 +1783,9 @@ static void ath_tx_txqaddbuf(struct ath_
@@ -1709,8 +1786,9 @@ static void ath_tx_txqaddbuf(struct ath_
}
}
@ -4617,7 +4621,7 @@
{
struct ath_frame_info *fi = get_frame_info(skb);
struct list_head bf_head;
@@ -1723,26 +1798,28 @@ static void ath_tx_send_ampdu(struct ath
@@ -1723,26 +1801,28 @@ static void ath_tx_send_ampdu(struct ath
* - seqno is not within block-ack window
* - h/w queue depth exceeds low water mark
*/
@ -4652,7 +4656,7 @@
bf->bf_state.bf_type = BUF_AMPDU;
INIT_LIST_HEAD(&bf_head);
list_add(&bf->list, &bf_head);
@@ -1751,10 +1828,10 @@ static void ath_tx_send_ampdu(struct ath
@@ -1751,10 +1831,10 @@ static void ath_tx_send_ampdu(struct ath
ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
/* Queue to h/w without aggregation */
@ -4666,7 +4670,7 @@
}
static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
@@ -1892,49 +1969,6 @@ static struct ath_buf *ath_tx_setup_buff
@@ -1892,49 +1972,6 @@ static struct ath_buf *ath_tx_setup_buff
return bf;
}
@ -4716,7 +4720,7 @@
/* Upon failure caller should free skb */
int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ath_tx_control *txctl)
@@ -1945,8 +1979,11 @@ int ath_tx_start(struct ieee80211_hw *hw
@@ -1945,8 +1982,11 @@ int ath_tx_start(struct ieee80211_hw *hw
struct ieee80211_vif *vif = info->control.vif;
struct ath_softc *sc = hw->priv;
struct ath_txq *txq = txctl->txq;
@ -4728,7 +4732,7 @@
int q;
/* NOTE: sta can be NULL according to net/mac80211.h */
@@ -2002,8 +2039,47 @@ int ath_tx_start(struct ieee80211_hw *hw
@@ -2002,8 +2042,47 @@ int ath_tx_start(struct ieee80211_hw *hw
txq->stopped = true;
}
@ -4777,7 +4781,7 @@
ath_txq_unlock(sc, txq);
return 0;
@@ -2054,7 +2130,12 @@ static void ath_tx_complete(struct ath_s
@@ -2054,7 +2133,12 @@ static void ath_tx_complete(struct ath_s
}
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
@ -4790,7 +4794,7 @@
if (txq == sc->tx.txq_map[q]) {
if (WARN_ON(--txq->pending_frames < 0))
txq->pending_frames = 0;
@@ -2065,8 +2146,6 @@ static void ath_tx_complete(struct ath_s
@@ -2065,8 +2149,6 @@ static void ath_tx_complete(struct ath_s
txq->stopped = false;
}
}
@ -4799,7 +4803,7 @@
}
static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
@@ -2408,12 +2487,10 @@ void ath_tx_node_init(struct ath_softc *
@@ -2408,12 +2490,10 @@ void ath_tx_node_init(struct ath_softc *
tid->baw_head = tid->baw_tail = 0;
tid->sched = false;
tid->paused = false;
@ -4813,7 +4817,7 @@
}
for (acno = 0, ac = &an->ac[acno];
@@ -2450,9 +2527,9 @@ void ath_tx_node_cleanup(struct ath_soft
@@ -2450,9 +2530,9 @@ void ath_tx_node_cleanup(struct ath_soft
}
ath_tid_drain(sc, txq, tid);