ath9k: fix initial sequence number after starting an ampdu session

txtid->seq_start may not always be up to date, when there is HT non-AMPDU
traffic just before starting an AMPDU session. Relying on txtid->seq_next
is better, since it is also used to generate the sequence numbers for
all QoS data frames.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 1adfebcd9b9ac7dd9c809fb58eadf349197dd4d7..6ddba4b361fd1690f7abdbac59e2291d8addd401 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -856,7 +856,7 @@ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
 
        txtid->state |= AGGR_ADDBA_PROGRESS;
        txtid->paused = true;
-       *ssn = txtid->seq_start;
+       *ssn = txtid->seq_start = txtid->seq_next;
 
        return 0;
 }