package/kernel/mac80211/patches/552-ath9k_rx_dma_stop_check.patch

   1 --- a/drivers/net/wireless/ath/ath9k/mac.c
   2 +++ b/drivers/net/wireless/ath/ath9k/mac.c
   3 @@ -705,7 +705,7 @@ bool ath9k_hw_stopdmarecv(struct ath_hw
   4  {
   5  #define AH_RX_STOP_DMA_TIMEOUT 10000   /* usec */
   6         struct ath_common *common = ath9k_hw_common(ah);
   7 -       u32 mac_status, last_mac_status = 0;
   8 +       u32 mac_status = 0, last_mac_status = 0;
   9         int i;
  10
  11         /* Enable access to the DMA observation bus */
  12 @@ -735,6 +735,16 @@ bool ath9k_hw_stopdmarecv(struct ath_hw
  13         }
  14
  15         if (i == 0) {
  16 +               if (!AR_SREV_9300_20_OR_LATER(ah) &&
  17 +                   (mac_status & 0x700) == 0) {
  18 +                       /*
  19 +                        * DMA is idle but the MAC is still stuck
  20 +                        * processing events
  21 +                        */
  22 +                       *reset = true;
  23 +                       return true;
  24 +               }
  25 +
  26                 ath_err(common,
  27                         "DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
  28                         AH_RX_STOP_DMA_TIMEOUT / 1000,