package/kernel/mac80211/patches/314-ath9k-rename-tx_complete_work-to-hw_check_work.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 25 Jan 2017 12:57:05 +0100
   3 Subject: [PATCH] ath9k: rename tx_complete_work to hw_check_work
   4
   5 Also include common MAC alive check. This should make the hang checks
   6 more reliable for modes where beacons are not sent and is used as a
   7 starting point for further hang check improvements
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
  13 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
  14 @@ -108,7 +108,7 @@ int ath_descdma_setup(struct ath_softc *
  15  #define ATH_AGGR_MIN_QDEPTH        2
  16  /* minimum h/w qdepth for non-aggregated traffic */
  17  #define ATH_NON_AGGR_MIN_QDEPTH    8
  18 -#define ATH_TX_COMPLETE_POLL_INT   1000
  19 +#define ATH_HW_CHECK_POLL_INT      1000
  20  #define ATH_TXFIFO_DEPTH           8
  21  #define ATH_TX_ERROR               0x01
  22
  23 @@ -745,7 +745,7 @@ void ath9k_csa_update(struct ath_softc *
  24  #define ATH_PAPRD_TIMEOUT         100 /* msecs */
  25  #define ATH_PLL_WORK_INTERVAL     100
  26
  27 -void ath_tx_complete_poll_work(struct work_struct *work);
  28 +void ath_hw_check_work(struct work_struct *work);
  29  void ath_reset_work(struct work_struct *work);
  30  bool ath_hw_check(struct ath_softc *sc);
  31  void ath_hw_pll_work(struct work_struct *work);
  32 @@ -1053,7 +1053,7 @@ struct ath_softc {
  33  #ifdef CPTCFG_ATH9K_DEBUGFS
  34         struct ath9k_debug debug;
  35  #endif
  36 -       struct delayed_work tx_complete_work;
  37 +       struct delayed_work hw_check_work;
  38         struct delayed_work hw_pll_work;
  39         struct timer_list sleep_timer;
  40
  41 --- a/drivers/net/wireless/ath/ath9k/init.c
  42 +++ b/drivers/net/wireless/ath/ath9k/init.c
  43 @@ -681,6 +681,7 @@ static int ath9k_init_softc(u16 devid, s
  44         INIT_WORK(&sc->hw_reset_work, ath_reset_work);
  45         INIT_WORK(&sc->paprd_work, ath_paprd_calibrate);
  46         INIT_DELAYED_WORK(&sc->hw_pll_work, ath_hw_pll_work);
  47 +       INIT_DELAYED_WORK(&sc->hw_check_work, ath_hw_check_work);
  48
  49         ath9k_init_channel_context(sc);
  50
  51 --- a/drivers/net/wireless/ath/ath9k/link.c
  52 +++ b/drivers/net/wireless/ath/ath9k/link.c
  53 @@ -20,20 +20,13 @@
  54   * TX polling - checks if the TX engine is stuck somewhere
  55   * and issues a chip reset if so.
  56   */
  57 -void ath_tx_complete_poll_work(struct work_struct *work)
  58 +static bool ath_tx_complete_check(struct ath_softc *sc)
  59  {
  60 -       struct ath_softc *sc = container_of(work, struct ath_softc,
  61 -                                           tx_complete_work.work);
  62         struct ath_txq *txq;
  63         int i;
  64 -       bool needreset = false;
  65 -
  66
  67 -       if (sc->tx99_state) {
  68 -               ath_dbg(ath9k_hw_common(sc->sc_ah), RESET,
  69 -                       "skip tx hung detection on tx99\n");
  70 -               return;
  71 -       }
  72 +       if (sc->tx99_state)
  73 +               return true;
  74
  75         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
  76                 txq = sc->tx.txq_map[i];
  77 @@ -41,25 +34,36 @@ void ath_tx_complete_poll_work(struct wo
  78                 ath_txq_lock(sc, txq);
  79                 if (txq->axq_depth) {
  80                         if (txq->axq_tx_inprogress) {
  81 -                               needreset = true;
  82                                 ath_txq_unlock(sc, txq);
  83 -                               break;
  84 -                       } else {
  85 -                               txq->axq_tx_inprogress = true;
  86 +                               goto reset;
  87                         }
  88 +
  89 +                       txq->axq_tx_inprogress = true;
  90                 }
  91                 ath_txq_unlock(sc, txq);
  92         }
  93
  94 -       if (needreset) {
  95 -               ath_dbg(ath9k_hw_common(sc->sc_ah), RESET,
  96 -                       "tx hung, resetting the chip\n");
  97 -               ath9k_queue_reset(sc, RESET_TYPE_TX_HANG);
  98 +       return true;
  99 +
 100 +reset:
 101 +       ath_dbg(ath9k_hw_common(sc->sc_ah), RESET,
 102 +               "tx hung, resetting the chip\n");
 103 +       ath9k_queue_reset(sc, RESET_TYPE_TX_HANG);
 104 +       return false;
 105 +
 106 +}
 107 +
 108 +void ath_hw_check_work(struct work_struct *work)
 109 +{
 110 +       struct ath_softc *sc = container_of(work, struct ath_softc,
 111 +                                           hw_check_work.work);
 112 +
 113 +       if (!ath_hw_check(sc) ||
 114 +           !ath_tx_complete_check(sc))
 115                 return;
 116 -       }
 117
 118 -       ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
 119 -                                    msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT));
 120 +       ieee80211_queue_delayed_work(sc->hw, &sc->hw_check_work,
 121 +                                    msecs_to_jiffies(ATH_HW_CHECK_POLL_INT));
 122  }
 123
 124  /*
 125 --- a/drivers/net/wireless/ath/ath9k/main.c
 126 +++ b/drivers/net/wireless/ath/ath9k/main.c
 127 @@ -181,7 +181,7 @@ void ath9k_ps_restore(struct ath_softc *
 128  static void __ath_cancel_work(struct ath_softc *sc)
 129  {
 130         cancel_work_sync(&sc->paprd_work);
 131 -       cancel_delayed_work_sync(&sc->tx_complete_work);
 132 +       cancel_delayed_work_sync(&sc->hw_check_work);
 133         cancel_delayed_work_sync(&sc->hw_pll_work);
 134
 135  #ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT
 136 @@ -198,7 +198,8 @@ void ath_cancel_work(struct ath_softc *s
 137
 138  void ath_restart_work(struct ath_softc *sc)
 139  {
 140 -       ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 141 +       ieee80211_queue_delayed_work(sc->hw, &sc->hw_check_work,
 142 +                                    ATH_HW_CHECK_POLL_INT);
 143
 144         if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah))
 145                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
 146 @@ -2091,7 +2092,7 @@ void __ath9k_flush(struct ieee80211_hw *
 147         int timeout;
 148         bool drain_txq;
 149
 150 -       cancel_delayed_work_sync(&sc->tx_complete_work);
 151 +       cancel_delayed_work_sync(&sc->hw_check_work);
 152
 153         if (ah->ah_flags & AH_UNPLUGGED) {
 154                 ath_dbg(common, ANY, "Device has been unplugged!\n");
 155 @@ -2129,7 +2130,8 @@ void __ath9k_flush(struct ieee80211_hw *
 156                 ath9k_ps_restore(sc);
 157         }
 158
 159 -       ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
 160 +       ieee80211_queue_delayed_work(hw, &sc->hw_check_work,
 161 +                                    ATH_HW_CHECK_POLL_INT);
 162  }
 163
 164  static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
 165 --- a/drivers/net/wireless/ath/ath9k/xmit.c
 166 +++ b/drivers/net/wireless/ath/ath9k/xmit.c
 167 @@ -2916,8 +2916,6 @@ int ath_tx_init(struct ath_softc *sc, in
 168                 return error;
 169         }
 170
 171 -       INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work);
 172 -
 173         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 174                 error = ath_tx_edma_init(sc);
 175