[27/71] ath9k: fix a chip wakeup related crash in ath9k_start

From: Greg KH
Date: Wed Apr 13 2011 - 12:24:50 EST

2.6.33-longterm review patch. If anyone has any objections, please let us know.


From: Felix Fietkau <nbd@xxxxxxxxxxx>

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@xxxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

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
@@ -2263,6 +2263,8 @@ static int ath9k_start(struct ieee80211_
"Starting driver with initial channel: %d MHz\n",

+ ath9k_ps_wakeup(sc);

if (ath9k_wiphy_started(sc)) {
@@ -2372,6 +2374,8 @@ static int ath9k_start(struct ieee80211_

+ ath9k_ps_restore(sc);
return r;

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/