package/mac80211/patches/410-ath9k-get-rid-of-unnecessary-setpower-calls.patch

   1 From 349626c9a263b41822a0c5a29061964b4a71ec3f Mon Sep 17 00:00:00 2001
   2 From: Gabor Juhos <juhosg@openwrt.org>
   3 Date: Thu, 23 Jul 2009 09:55:52 +0200
   4 Subject: [PATCH 2/2] ath9k: get rid of unnecessary setpower calls
   5
   6 We are using setpower routines regardless of the current power mode.
   7 Don't bother the hardware, if it is not necessary.
   8
   9 Changes-licensed-under: ISC
  10 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  11 ---
  12  drivers/net/wireless/ath/ath9k/hw.c |    8 ++++++--
  13  1 files changed, 6 insertions(+), 2 deletions(-)
  14
  15 --- a/drivers/net/wireless/ath/ath9k/hw.c
  16 +++ b/drivers/net/wireless/ath/ath9k/hw.c
  17 @@ -475,6 +475,8 @@ static struct ath_hw *ath9k_hw_newstate(
  18
  19         ah->gbeacon_rate = 0;
  20
  21 +       ah->power_mode = ATH9K_PM_UNDEFINED;
  22 +
  23         return ah;
  24  }
  25
  26 @@ -2749,6 +2751,9 @@ static bool ath9k_hw_setpower_nolock(str
  27                 "UNDEFINED"
  28         };
  29
  30 +       if (ah->power_mode == mode)
  31 +               return status;
  32 +
  33         DPRINTF(ah->ah_sc, ATH_DBG_RESET, "%s -> %s\n",
  34                 modes[ah->power_mode], modes[mode]);
  35
  36 @@ -2793,8 +2798,7 @@ void ath9k_ps_wakeup(struct ath_softc *s
  37         if (++sc->ps_usecount != 1)
  38                 goto unlock;
  39
  40 -       if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
  41 -               ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_AWAKE);
  42 +       ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_AWAKE);
  43
  44   unlock:
  45         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);