diff --git a/[refs] b/[refs]
index 08d117d78193..75a2961d5ae5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 44316cb1e97a1e7f76eb3f07e5b0ba91d72e9693
+refs/heads/master: 9abbfb27dd96361187bb3872b2c349a76f5e09e9
diff --git a/trunk/drivers/net/wireless/ath/ath9k/main.c b/trunk/drivers/net/wireless/ath/ath9k/main.c
index ca35aaa7aec6..5b4ef81318f5 100644
--- a/trunk/drivers/net/wireless/ath/ath9k/main.c
+++ b/trunk/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);
 }