[PATCH] 802.11n IBSS: wlan0 stops receiving packets due to aggregation after sender reboot
From: khalasa@piap.pl (Krzysztof Hałasa)
Date: 2019-10-21 12:19:00
Also in:
linux-wireless, lkml
Subsystem:
mac80211, the rest · Maintainers:
Johannes Berg, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2019-10-22 · Re: [PATCH] 802.11n IBSS: wlan0 stops receiving packets due to aggregation after sender reboot · Sergei Shtylyov <hidden>
- 2019-10-22 · [PATCH] 802.11n IBSS: wlan0 stops receiving packets due to aggregation after sender reboot · khalasa@piap.pl (Krzysztof Hałasa)
Fix a bug where the mac80211 RX aggregation code sets a new aggregation "session" at the remote station's request, but the head_seq_num (the sequence number the receiver expects to receive) isn't reset. Spotted on a pair of AR9580 in IBSS mode.
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index 4d1c335e06e5..775a51cc51c9 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c@@ -354,9 +354,11 @@ void ___ieee80211_start_rx_ba_session(struct sta_info *sta, */ rcu_read_lock(); tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); - if (tid_rx && tid_rx->timeout == timeout) + if (tid_rx && tid_rx->timeout == timeout) { + tid_rx->ssn = start_seq_num; + tid_rx->head_seq_num = start_seq_num; status = WLAN_STATUS_SUCCESS; - else + } else status = WLAN_STATUS_REQUEST_DECLINED; rcu_read_unlock(); goto end;
--
Krzysztof Hałasa
ŁUKASIEWICZ Research Network
Industrial Research Institute for Automation and Measurements PIAP
Al. Jerozolimskie 202, 02-486 Warsaw, Poland