package/mac80211/patches/560-ath9k_reset_after_full_sleep.patch

   1 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
   2 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
   3 @@ -619,6 +619,7 @@ struct ath_softc {
   4         u16 curtxpow;
   5         bool ps_enabled;
   6         bool ps_idle;
   7 +       bool ps_fullsleep;
   8         short nbcnvifs;
   9         short nvifs;
  10         unsigned long ps_usecount;
  11 --- a/drivers/net/wireless/ath/ath9k/main.c
  12 +++ b/drivers/net/wireless/ath/ath9k/main.c
  13 @@ -118,9 +118,10 @@ void ath9k_ps_restore(struct ath_softc *
  14         if (--sc->ps_usecount != 0)
  15                 goto unlock;
  16
  17 -       if (sc->ps_idle)
  18 +       if (sc->ps_idle && (sc->ps_flags & PS_WAIT_FOR_TX_ACK)) {
  19                 mode = ATH9K_PM_FULL_SLEEP;
  20 -       else if (sc->ps_enabled &&
  21 +               sc->ps_fullsleep = true;
  22 +       } else if (sc->ps_enabled &&
  23                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
  24                               PS_WAIT_FOR_CAB |
  25                               PS_WAIT_FOR_PSPOLL_DATA |
  26 @@ -275,6 +276,7 @@ static bool ath_complete_reset(struct at
  27                                sc->config.txpowlimit, &sc->curtxpow);
  28         ath9k_hw_set_interrupts(ah);
  29         ath9k_hw_enable_interrupts(ah);
  30 +       sc->ps_fullsleep = false;
  31
  32         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
  33                 if (sc->sc_flags & SC_OP_BEACONS)
  34 @@ -332,7 +334,8 @@ static int ath_reset_internal(struct ath
  35                 hchan = ah->curchan;
  36         }
  37
  38 -       if (fastcc && !ath9k_hw_check_alive(ah))
  39 +       if (fastcc && (sc->ps_fullsleep ||
  40 +           !ath9k_hw_check_alive(ah)))
  41                 fastcc = false;
  42
  43         if (!ath_prepare_reset(sc, retry_tx, flush))
  44 @@ -1173,6 +1176,13 @@ static void ath9k_tx(struct ieee80211_hw
  45                 }
  46         }
  47
  48 +       /*
  49 +        * Cannot tx while the hardware is in full sleep, it first needs a full
  50 +        * chip reset to recover from that
  51 +        */
  52 +       if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP))
  53 +               goto exit;
  54 +
  55         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
  56                 /*
  57                  * We are using PS-Poll and mac80211 can request TX while in
  58 --- a/drivers/net/wireless/ath/ath9k/xmit.c
  59 +++ b/drivers/net/wireless/ath/ath9k/xmit.c
  60 @@ -1983,7 +1983,7 @@ static void ath_tx_complete(struct ath_s
  61                 skb_pull(skb, padsize);
  62         }
  63
  64 -       if (sc->ps_flags & PS_WAIT_FOR_TX_ACK) {
  65 +       if ((sc->ps_flags & PS_WAIT_FOR_TX_ACK) && !txq->axq_depth) {
  66                 sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK;
  67                 ath_dbg(common, ATH_DBG_PS,
  68                         "Going back to sleep after having received TX status (0x%lx)\n",