[054/105] ath9k: fix a chip wakeup related crash in ath9k_start

Greg KH
2011-04-12T14:50:32Z

From: Felix Fietkau <nbd@openwrt.org>

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>

---
drivers/net/wireless/ath/ath9k/main.c | 4 ++++
1 file changed, 4 insertions(+)

--- 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_
"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_
mutex_unlock:
mutex_unlock(&sc->mutex);

+ ath9k_ps_restore(sc);
+
return r;
}