package/mac80211/patches/543-ath9k_fix_half_quarter_rx_latency.patch

   1 --- a/drivers/net/wireless/ath/ath9k/hw.c
   2 +++ b/drivers/net/wireless/ath/ath9k/hw.c
   3 @@ -1006,16 +1006,26 @@ void ath9k_hw_init_global_settings(struc
   4
   5         if (IS_CHAN_HALF_RATE(chan)) {
   6                 eifs = 175;
   7 -               rx_lat *= 2;
   8 +
   9 +               if (!AR_SREV_9300_20_OR_LATER(ah))
  10 +                       rx_lat = 10;
  11 +               else
  12 +                       rx_lat *= 2;
  13 +
  14                 tx_lat *= 2;
  15                 if (IS_CHAN_A_FAST_CLOCK(ah, chan))
  16 -                   tx_lat += 11;
  17 +                       tx_lat += 11;
  18
  19                 slottime = 13;
  20                 sifstime = 32;
  21         } else if (IS_CHAN_QUARTER_RATE(chan)) {
  22                 eifs = 340;
  23 -               rx_lat = (rx_lat * 4) - 1;
  24 +
  25 +               if (!AR_SREV_9300_20_OR_LATER(ah))
  26 +                       rx_lat = 20;
  27 +               else
  28 +                       rx_lat = (rx_lat * 4) - 1;
  29 +
  30                 tx_lat *= 4;
  31                 if (IS_CHAN_A_FAST_CLOCK(ah, chan))
  32                     tx_lat += 22;