ath9k_htc: Protect ampdu_action with a mutex

This is required when issuing commands to the firmware.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index 9620f4532f02..04cb243416ae 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -1639,6 +1639,8 @@ static int ath9k_htc_ampdu_action(struct ieee80211_hw *hw,
         struct ath9k_htc_sta *ista;
         int ret = 0;
 
+        mutex_lock(&priv->mutex);
+
         switch (action) {
         case IEEE80211_AMPDU_RX_START:
                 break;
@@ -1663,6 +1665,8 @@ static int ath9k_htc_ampdu_action(struct ieee80211_hw *hw,
                 ath_err(ath9k_hw_common(priv->ah), "Unknown AMPDU action\n");
         }
 
+        mutex_unlock(&priv->mutex);
+
         return ret;
 }