package/kernel/mac80211/patches/subsys/337-mac80211-fix-queue-selection-for-mesh-OCB-interfaces.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Sat, 2 Jul 2022 16:41:32 +0200
   3 Subject: [PATCH] mac80211: fix queue selection for mesh/OCB interfaces
   4
   5 When using iTXQ, the code assumes that there is only one vif queue for
   6 broadcast packets, using the BE queue. Allowing non-BE queue marking
   7 violates that assumption and txq->ac == skb_queue_mapping is no longer
   8 guaranteed. This can cause issues with queue handling in the driver and
   9 also causes issues with the recent ATF change, resulting in an AQL
  10 underflow warning.
  11
  12 Cc: stable@vger.kernel.org
  13 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  14 ---
  15
  16 --- a/net/mac80211/wme.c
  17 +++ b/net/mac80211/wme.c
  18 @@ -147,8 +147,8 @@ u16 __ieee80211_select_queue(struct ieee
  19         bool qos;
  20
  21         /* all mesh/ocb stations are required to support WME */
  22 -       if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
  23 -           sdata->vif.type == NL80211_IFTYPE_OCB)
  24 +       if (sta && (sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
  25 +                   sdata->vif.type == NL80211_IFTYPE_OCB))
  26                 qos = true;
  27         else if (sta)
  28                 qos = sta->sta.wme;