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: v2.6.38.3~52
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0325b60bff25923b488313f2ef10d88050bd67e;p=thirdparty%2Fkernel%2Fstable.git

ath9k: fix a chip wakeup related crash in ath9k_start

commit f62d816fc4324afbb7cf90110c70b6a14139b225 upstream.

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>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index a09d15f7aa6e0..0848e09954749 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1063,6 +1063,8 @@ 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);
 
 	if (ath9k_wiphy_started(sc)) {
@@ -1179,6 +1181,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
 mutex_unlock:
 	mutex_unlock(&sc->mutex);
 
+	ath9k_ps_restore(sc);
+
 	return r;
 }