package/kernel/mac80211/patches/319-v4.17-0003-mac80211-support-fast-rx-with-incompatible-PS-capabi.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Fri, 23 Feb 2018 10:01:53 +0100
   3 Subject: [PATCH] mac80211: support fast-rx with incompatible PS
   4  capabilities when PS is disabled
   5
   6 When powersave is disabled for the interface, we can do fast-rx anyway.
   7
   8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   9 ---
  10
  11 --- a/net/mac80211/cfg.c
  12 +++ b/net/mac80211/cfg.c
  13 @@ -2658,6 +2658,7 @@ static int ieee80211_set_power_mgmt(stru
  14
  15         ieee80211_recalc_ps(local);
  16         ieee80211_recalc_ps_vif(sdata);
  17 +       ieee80211_check_fast_rx_iface(sdata);
  18
  19         return 0;
  20  }
  21 --- a/net/mac80211/rx.c
  22 +++ b/net/mac80211/rx.c
  23 @@ -3741,12 +3741,7 @@ void ieee80211_check_fast_rx(struct sta_
  24                 /* 4-addr is harder to deal with, later maybe */
  25                 if (sdata->u.mgd.use_4addr)
  26                         goto clear;
  27 -               /* software powersave is a huge mess, avoid all of it */
  28 -               if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
  29 -                       goto clear;
  30 -               if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
  31 -                   !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
  32 -                       goto clear;
  33 +
  34                 if (sta->sta.tdls) {
  35                         fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1);
  36                         fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2);
  37 @@ -3758,6 +3753,16 @@ void ieee80211_check_fast_rx(struct sta_
  38                         fastrx.expected_ds_bits =
  39                                 cpu_to_le16(IEEE80211_FCTL_FROMDS);
  40                 }
  41 +
  42 +               if (!sdata->u.mgd.powersave)
  43 +                   break;
  44 +
  45 +               /* software powersave is a huge mess, avoid all of it */
  46 +               if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
  47 +                       goto clear;
  48 +               if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
  49 +                   !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
  50 +                       goto clear;
  51                 break;
  52         case NL80211_IFTYPE_AP_VLAN:
  53         case NL80211_IFTYPE_AP: