[PATCH mt76 2/2] wifi: mt76: fix queue assignment for deauth packets

[Felix Fietkau <nbd@nbd.name>]

When running in AP mode and deauthenticating a client that's in powersave
mode, the disassoc/deauth packet can get stuck in a tx queue along with
other buffered frames. This can fill up hardware queues with frames
that are only released after the WTBL slot is reused for another client.

Fix this by moving deauth packets to the ALTX queue.

Reported-by: Chad Monroe <chad.monroe@adtran.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/tx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/tx.c b/drivers/net/wireless/mediatek/mt76/tx.c
index 251ee3ce5e4d..e6cf16706667 100644
--- a/drivers/net/wireless/mediatek/mt76/tx.c
+++ b/drivers/net/wireless/mediatek/mt76/tx.c
@@ -615,7 +615,8 @@ mt76_txq_schedule_pending_wcid(struct mt76_phy *phy, struct mt76_wcid *wcid,
 		if ((dev->drv->drv_flags & MT_DRV_HW_MGMT_TXQ) &&
 		    !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
 		    !ieee80211_is_data(hdr->frame_control) &&
-		    !ieee80211_is_bufferable_mmpdu(skb))
+		    (!ieee80211_is_bufferable_mmpdu(skb) ||
+		     ieee80211_is_deauth(hdr->frame_control)))
 			qid = MT_TXQ_PSD;
 
 		q = phy->q_tx[qid];
-- 
2.49.0