ath9k: fix a chip wakeup related crash in ath9k_start

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>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 524825720a09..dddb85de622d 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1048,6 +1048,8 @@ 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);
 
         /* setup initial channel */
@@ -1143,6 +1145,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
 mutex_unlock:
         mutex_unlock(&sc->mutex);
 
+        ath9k_ps_restore(sc);
+
         return r;
 }