ath9k: get rid of unnecessary setpower calls

We are using setpower routines regardless of the current power mode.
Don't bother the hardware, if it is not necessary.

Changes-licensed-under: ISC
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index e6e52f48e718..431854ccb65b 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -478,6 +478,8 @@ static struct ath_hw *ath9k_hw_newstate(u16 devid, struct ath_softc *sc,
 
         ah->gbeacon_rate = 0;
 
+        ah->power_mode = ATH9K_PM_UNDEFINED;
+
         return ah;
 }
 
@@ -2819,6 +2821,9 @@ static bool ath9k_hw_setpower_nolock(struct ath_hw *ah,
                 "UNDEFINED"
         };
 
+        if (ah->power_mode == mode)
+                return status;
+
         DPRINTF(ah->ah_sc, ATH_DBG_RESET, "%s -> %s\n",
                 modes[ah->power_mode], modes[mode]);
 
@@ -2863,8 +2868,7 @@ void ath9k_ps_wakeup(struct ath_softc *sc)
         if (++sc->ps_usecount != 1)
                 goto unlock;
 
-        if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
-                ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_AWAKE);
+        ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_AWAKE);
 
  unlock:
         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);