mt76: check qos ack policy before reordering packets

Do not attempt to reorder packets not part of a BA session

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/mediatek/mt76/agg-rx.c b/drivers/net/wireless/mediatek/mt76/agg-rx.c
index 6657ec8..dbf4057 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/agg-rx.c
+++ b/drivers/net/wireless/mediatek/mt76/agg-rx.c
@@ -147,12 +147,13 @@ mt76_rx_aggr_check_ctl(struct sk_buff *skb, struct sk_buff_head *frames)
 void mt76_rx_aggr_reorder(struct sk_buff *skb, struct sk_buff_head *frames)
 {
        struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb;
+       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        struct mt76_wcid *wcid = status->wcid;
        struct ieee80211_sta *sta;
        struct mt76_rx_tid *tid;
        bool sn_less;
        u16 seqno, head, size;
-       u8 idx;
+       u8 ackp, idx;
 
        __skb_queue_tail(frames, skb);
 
@@ -165,6 +166,12 @@ void mt76_rx_aggr_reorder(struct sk_buff *skb, struct sk_buff_head *frames)
                return;
        }
 
+       /* not part of a BA session */
+       ackp = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_ACK_POLICY_MASK;
+       if (ackp != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
+           ackp != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL)
+               return;
+
        tid = rcu_dereference(wcid->aggr[status->tid]);
        if (!tid)
                return;