ath9k: Use power save wrappers for TSF get/set

The HW has to be awake when accessing registers.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
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 ca35aaa7aec6..5b4ef81318f5 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1987,7 +1987,9 @@ static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
         struct ath_softc *sc = aphy->sc;
 
         mutex_lock(&sc->mutex);
+        ath9k_ps_wakeup(sc);
         tsf = ath9k_hw_gettsf64(sc->sc_ah);
+        ath9k_ps_restore(sc);
         mutex_unlock(&sc->mutex);
 
         return tsf;
@@ -1999,7 +2001,9 @@ static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
         struct ath_softc *sc = aphy->sc;
 
         mutex_lock(&sc->mutex);
+        ath9k_ps_wakeup(sc);
         ath9k_hw_settsf64(sc->sc_ah, tsf);
+        ath9k_ps_restore(sc);
         mutex_unlock(&sc->mutex);
 }