package/mac80211/patches/540-short_slot_handling.patch

   1 --- a/net/mac80211/mlme.c
   2 +++ b/net/mac80211/mlme.c
   3 @@ -670,6 +670,8 @@ static u32 ieee80211_handle_bss_capabili
   4         }
   5
   6         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
   7 +       if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
   8 +               use_short_slot = true;
   9
  10         if (use_protection != bss_conf->use_cts_prot) {
  11                 bss_conf->use_cts_prot = use_protection;
  12 --- a/net/mac80211/cfg.c
  13 +++ b/net/mac80211/cfg.c
  14 @@ -1087,6 +1087,13 @@ static int ieee80211_change_bss(struct w
  15                         params->use_short_preamble;
  16                 changed |= BSS_CHANGED_ERP_PREAMBLE;
  17         }
  18 +
  19 +       if (!sdata->vif.bss_conf.use_short_slot &&
  20 +           sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) {
  21 +               sdata->vif.bss_conf.use_short_slot = true;
  22 +               changed |= BSS_CHANGED_ERP_SLOT;
  23 +       }
  24 +
  25         if (params->use_short_slot_time >= 0) {
  26                 sdata->vif.bss_conf.use_short_slot =
  27                         params->use_short_slot_time;