Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [81/106] ath9k: fix a chip wakeup related crash in ath9k_start | Date | Tue, 26 Apr 2011 14:14:02 -0700 (PDT) |
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2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Felix Fietkau <nbd@openwrt.org>
[ upstream commit f62d816fc4324afbb7cf90110c70b6a14139b225 ]
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: Andi Kleen <ak@linux.intel.com> Cc: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
Index: linux-2.6.35.y/drivers/net/wireless/ath/ath9k/main.c =================================================================== --- linux-2.6.35.y.orig/drivers/net/wireless/ath/ath9k/main.c +++ linux-2.6.35.y/drivers/net/wireless/ath/ath9k/main.c @@ -1124,6 +1124,8 @@ 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)) { @@ -1238,6 +1240,8 @@ static int ath9k_start(struct ieee80211_ mutex_unlock: mutex_unlock(&sc->mutex); + ath9k_ps_restore(sc); + return r; }
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