ath9k_htc: Handle TX queue overflow

Stop/restart TX queues when the internal SKB
queue is full. This helps handle TX better
under heavy load.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc.h b/drivers/net/wireless/ath/ath9k/htc.h
index 698e6f1a506a..e09c6c2c9e23 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -349,6 +349,9 @@ struct ath9k_htc_priv {
         struct sk_buff *beacon;
         spinlock_t beacon_lock;
 
+        bool tx_queues_stop;
+        spinlock_t tx_lock;
+
         struct ieee80211_vif *vif;
         unsigned int rxfilter;
         struct tasklet_struct wmi_tasklet;