blob: e181d68ff7ce3a9a8ffdda2ac5d43e6bf83a49c9 [file] [log] [blame]
From f62d816fc4324afbb7cf90110c70b6a14139b225 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 25 Mar 2011 17:43:41 +0100
Subject: ath9k: fix a chip wakeup related crash in ath9k_start
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
@@ -2263,6 +2263,8 @@ 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)) {
@@ -2372,6 +2374,8 @@ static int ath9k_start(struct ieee80211_
mutex_unlock:
mutex_unlock(&sc->mutex);
+ ath9k_ps_restore(sc);
+
return r;
}