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[PATCH 11/23] ath9k_htc: Protect ampdu_action with a mutex

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From: Sujith Manoharan <Sujith.Manoharan@xxxxxxxxxxx>

This is required when issuing commands to the firmware.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@xxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath9k/htc_drv_main.c |    4 ++++
 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 9620f45..04cb243 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;
 }
 
-- 
1.7.4.1

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