package/madwifi/patches/444-beacon_update_war.patch

   1 --- a/net80211/ieee80211_beacon.c
   2 +++ b/net80211/ieee80211_beacon.c
   3 @@ -476,6 +476,14 @@ ieee80211_beacon_update(struct ieee80211
   4                         tie->tim_bitctl |= BITCTL_BUFD_MCAST;
   5                 else
   6                         tie->tim_bitctl &= ~BITCTL_BUFD_MCAST;
   7 +
   8 +               /* WAR: on some platforms, a race condition between beacon
   9 +                * contents update and beacon transmission leads to beacon
  10 +                * data not being updated in time. For most fields this is
  11 +                * not critical, but for powersave it is. Work around this
  12 +                * by always remapping the beacon when the TIM IE changes.
  13 +                */
  14 +               len_changed = 1;
  15         }
  16
  17         /* Whenever we want to switch to a new channel, we need to follow the