From 50e2ab39291947b6c6c7025cf01707c270fcde59 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Sat, 2 Jul 2022 16:52:27 +0200
Subject: [PATCH] wifi: mac80211: fix queue selection for mesh/OCB interfaces
Git-commit: 50e2ab39291947b6c6c7025cf01707c270fcde59
Patch-mainline: v5.19-rc7
References: git-fixes

When using iTXQ, the code assumes that there is only one vif queue for
broadcast packets, using the BE queue. Allowing non-BE queue marking
violates that assumption and txq->ac == skb_queue_mapping is no longer
guaranteed. This can cause issues with queue handling in the driver and
also causes issues with the recent ATF change, resulting in an AQL
underflow warning.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20220702145227.39356-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 net/mac80211/wme.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 62c6733e0792..d50480b31750 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -147,8 +147,8 @@ u16 __ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
 	bool qos;
 
 	/* all mesh/ocb stations are required to support WME */
-	if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
-	    sdata->vif.type == NL80211_IFTYPE_OCB)
+	if (sta && (sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
+		    sdata->vif.type == NL80211_IFTYPE_OCB))
 		qos = true;
 	else if (sta)
 		qos = sta->sta.wme;
-- 
2.35.3