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>

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index e6e52f48e7184e216ce1530863971964f8dd85d2..431854ccb65b3f4b43c2c6c23c5377f693f30170 100644 (file)
--- 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);