From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 25 Mar 2011 16:43:41 +0000 (+0100)
Subject: ath9k: fix a chip wakeup related crash in ath9k_start
X-Git-Tag: v2.6.39-rc2~7^2~8^2~10
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=f62d816fc4324afbb7cf90110c70b6a14139b225;p=~shefty%2Frdma-dev.git

ath9k: fix a chip wakeup related crash in ath9k_start

When the chip is still asleep when ath9k_start is called,
ath9k_hw_configpcipowersave can trigger a data bus error.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 524825720a0..dddb85de622 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1048,6 +1048,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
 		"Starting driver with initial channel: %d MHz\n",
 		curchan->center_freq);
 
+	ath9k_ps_wakeup(sc);
+
 	mutex_lock(&sc->mutex);
 
 	/* setup initial channel */
@@ -1143,6 +1145,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
 mutex_unlock:
 	mutex_unlock(&sc->mutex);
 
+	ath9k_ps_restore(sc);
+
 	return r;
 }