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[5.16] mac80211: send ADDBA requests using the tid/queue of the aggregation session

Message ID 20211202124533.80388-1-nbd@nbd.name
State New
Headers show
Series [5.16] mac80211: send ADDBA requests using the tid/queue of the aggregation session | expand

Commit Message

Felix Fietkau Dec. 2, 2021, 12:45 p.m. UTC
Sending them out on a different queue can cause a race condition where a
number of packets in the queue may be discarded by the receiver, because
the ADDBA request is sent too early.
This affects any driver with software A-MPDU setup which does not allocate
packet seqno in hardware on tx, regardless of whether iTXQ is used or not.
The only driver I've seen that explicitly deals with this issue internally
is mwl8k.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 net/mac80211/agg-tx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index c1558dd2d244..58761ca7da3c 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -106,7 +106,7 @@  static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
 	mgmt->u.action.u.addba_req.start_seq_num =
 					cpu_to_le16(start_seq_num << 4);
 
-	ieee80211_tx_skb(sdata, skb);
+	ieee80211_tx_skb_tid(sdata, skb, tid);
 }
 
 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn)