package/mac80211/patches/542-ath9k_fix_half_quarter_sifs.patch

   1 --- a/drivers/net/wireless/ath/ath9k/hw.c
   2 +++ b/drivers/net/wireless/ath/ath9k/hw.c
   3 @@ -1007,31 +1007,35 @@ void ath9k_hw_init_global_settings(struc
   4         if (IS_CHAN_HALF_RATE(chan)) {
   5                 eifs = 175;
   6
   7 -               if (!AR_SREV_9300_20_OR_LATER(ah))
   8 +               if (!AR_SREV_9300_20_OR_LATER(ah)) {
   9                         rx_lat = 10;
  10 -               else
  11 +                       sifstime = 8;
  12 +               } else {
  13                         rx_lat *= 2;
  14 +                       sifstime = 32;
  15 +               }
  16
  17                 tx_lat *= 2;
  18                 if (IS_CHAN_A_FAST_CLOCK(ah, chan))
  19                         tx_lat += 11;
  20
  21                 slottime = 13;
  22 -               sifstime = 32;
  23         } else if (IS_CHAN_QUARTER_RATE(chan)) {
  24                 eifs = 340;
  25
  26 -               if (!AR_SREV_9300_20_OR_LATER(ah))
  27 +               if (!AR_SREV_9300_20_OR_LATER(ah)) {
  28                         rx_lat = 20;
  29 -               else
  30 +                       sifstime = 8;
  31 +               } else {
  32                         rx_lat = (rx_lat * 4) - 1;
  33 +                       sifstime = 64;
  34 +               }
  35
  36                 tx_lat *= 4;
  37                 if (IS_CHAN_A_FAST_CLOCK(ah, chan))
  38                     tx_lat += 22;
  39
  40                 slottime = 21;
  41 -               sifstime = 64;
  42         } else {
  43                 if (AR_SREV_9287(ah) && AR_SREV_9287_13_OR_LATER(ah)) {
  44                         eifs = AR_D_GBL_IFS_EIFS_ASYNC_FIFO;