ath9k: fix an invalid pointer access in the tx path

SVN-Revision: 32376

package/mac80211/patches/300-pending_work.patch

@@ -523,3 +523,53 @@
  }
  #endif
  
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -214,6 +214,7 @@ struct ath_frame_info {
+ 	enum ath9k_key_type keytype;
+ 	u8 keyix;
+ 	u8 retries;
++	bool short_preamble;
+ };
+ 
+ struct ath_buf_state {
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -938,6 +938,7 @@ static void ath_buf_set_rate(struct ath_
+ 	struct ieee80211_tx_rate *rates;
+ 	const struct ieee80211_rate *rate;
+ 	struct ieee80211_hdr *hdr;
++	struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu);
+ 	int i;
+ 	u8 rix = 0;
+ 
+@@ -957,8 +958,7 @@ static void ath_buf_set_rate(struct ath_
+ 	rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info);
+ 	info->rtscts_rate = rate->hw_value;
+ 
+-	if (tx_info->control.vif &&
+-	    tx_info->control.vif->bss_conf.use_short_preamble)
++	if (fi->short_preamble)
+ 		info->rtscts_rate |= rate->hw_value_short;
+ 
+ 	for (i = 0; i < 4; i++) {
+@@ -1779,6 +1779,11 @@ static void setup_frame_info(struct ieee
+ 	struct ath_frame_info *fi = get_frame_info(skb);
+ 	struct ath_node *an = NULL;
+ 	enum ath9k_key_type keytype;
++	bool short_preamble = false;
++
++	if (tx_info->control.vif &&
++	    tx_info->control.vif->bss_conf.use_short_preamble)
++		short_preamble = true;
+ 
+ 	keytype = ath9k_cmn_get_hw_crypto_keytype(skb);
+ 
+@@ -1794,6 +1799,7 @@ static void setup_frame_info(struct ieee
+ 		fi->keyix = ATH9K_TXKEYIX_INVALID;
+ 	fi->keytype = keytype;
+ 	fi->framelen = framelen;
++	fi->short_preamble = short_preamble;
+ }
+ 
+ u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate)

package/mac80211/patches/512-ath9k_channelbw_debugfs.patch

@@ -1,6 +1,6 @@
 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
-@@ -620,6 +620,7 @@ struct ath_softc {
+@@ -621,6 +621,7 @@ struct ath_softc {
  	struct ieee80211_hw *hw;
  	struct device *dev;
  
@@ -8,7 +8,7 @@
  	struct survey_info *cur_survey;
  	struct survey_info survey[ATH9K_NUM_CHANNELS];
  
-@@ -687,6 +688,7 @@ struct ath_softc {
+@@ -688,6 +689,7 @@ struct ath_softc {
  	struct dfs_pattern_detector *dfs_detector;
  };
  

package/mac80211/patches/530-ath9k_limit_qlen.patch

@@ -1,6 +1,6 @@
 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
-@@ -243,6 +243,7 @@ struct ath_atx_tid {
+@@ -244,6 +244,7 @@ struct ath_atx_tid {
  	struct ath_node *an;
  	struct ath_atx_ac *ac;
  	unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
@@ -8,7 +8,7 @@
  	int bar_index;
  	u16 seq_start;
  	u16 seq_next;
-@@ -289,6 +290,9 @@ struct ath_tx_control {
+@@ -290,6 +291,9 @@ struct ath_tx_control {
   *  (axq_qnum).
   */
  struct ath_tx {
@@ -74,7 +74,7 @@
  	/* Queue to h/w without aggregation */
  	TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw);
  	bf->bf_lastbf = bf;
-@@ -1873,22 +1886,11 @@ error:
+@@ -1879,22 +1892,11 @@ error:
  
  /* FIXME: tx power */
  static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
@@ -99,7 +99,7 @@
  
  	if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
  		/*
-@@ -1920,6 +1922,7 @@ int ath_tx_start(struct ieee80211_hw *hw
+@@ -1926,6 +1928,7 @@ 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;
@@ -107,7 +107,7 @@
  	int padpos, padsize;
  	int frmlen = skb->len + FCS_LEN;
  	int q;
-@@ -1962,6 +1965,24 @@ int ath_tx_start(struct ieee80211_hw *hw
+@@ -1968,6 +1971,24 @@ int ath_tx_start(struct ieee80211_hw *hw
  
  	setup_frame_info(hw, skb, frmlen);
  
@@ -132,7 +132,7 @@
  	/*
  	 * At this point, the vif, hw_key and sta pointers in the tx control
  	 * info are no longer valid (overwritten by the ath_frame_info data.
-@@ -1976,7 +1997,7 @@ int ath_tx_start(struct ieee80211_hw *hw
+@@ -1982,7 +2003,7 @@ int ath_tx_start(struct ieee80211_hw *hw
  		txq->stopped = true;
  	}
  

package/mac80211/patches/540-ath9k_extra_leds.patch

@@ -1,6 +1,6 @@
 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
-@@ -507,6 +507,9 @@ static inline u16 ath9k_btcoex_aggr_limi
+@@ -508,6 +508,9 @@ static inline u16 ath9k_btcoex_aggr_limi
  #ifdef CONFIG_MAC80211_LEDS
  void ath_init_leds(struct ath_softc *sc);
  void ath_deinit_leds(struct ath_softc *sc);
@@ -10,7 +10,7 @@
  #else
  static inline void ath_init_leds(struct ath_softc *sc)
  {
-@@ -620,6 +623,13 @@ struct ath9k_vif_iter_data {
+@@ -621,6 +624,13 @@ struct ath9k_vif_iter_data {
  	int nadhocs;   /* number of adhoc vifs */
  };
  
@@ -24,7 +24,7 @@
  struct ath_softc {
  	struct ieee80211_hw *hw;
  	struct device *dev;
-@@ -661,9 +671,8 @@ struct ath_softc {
+@@ -662,9 +672,8 @@ struct ath_softc {
  	struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS];
  
  #ifdef CONFIG_MAC80211_LEDS