ath9k: Fix sequence number assignment

Currently, ath9k uses a global counter for all
frames that need to be assigned a sequence number.
QoS-data frames are handled properly since they
have a per-tid counter. But, beacons and other
management frames use the same counter even if
multiple interfaces or contexts are present.

Fix this issue by making the counter per-interface
and using it when mac80211 sets IEEE80211_TX_CTL_ASSIGN_SEQ.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ath9k.h

@@ -294,7 +294,6 @@ struct ath_tx_control {
  *  (axq_qnum).
  */
 struct ath_tx {
-	u16 seq_no;
 	u32 txqsetup;
 	spinlock_t txbuflock;
 	struct list_head txbuf;
@@ -563,6 +562,7 @@ int ath_tx_init(struct ath_softc *sc, int nbufs);
 int ath_txq_update(struct ath_softc *sc, int qnum,
 		   struct ath9k_tx_queue_info *q);
 void ath_update_max_aggr_framelen(struct ath_softc *sc, int queue, int txop);
+void ath_assign_seq(struct ath_common *common, struct sk_buff *skb);
 int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
 		 struct ath_tx_control *txctl);
 void ath_tx_cabq(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
@@ -592,6 +592,8 @@ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
 struct ath_vif {
 	struct list_head list;
 
+	u16 seq_no;
+
 	/* BSS info */
 	u8 bssid[ETH_ALEN];
 	u16 aid;