From: Felix Fietkau <nbd@xxxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit 558ff225de80ac95b132d3a115ddadcd64498b4f upstream.
When passing tx frames to the U-APSD queue for powersave poll responses,
the ath_atx_tid pointer needs to be passed to ath_tx_setup_buffer for
proper sequence number accounting.
This fixes high latency and connection stability issues with ath9k
running as AP and a few kinds of mobile phones as client, when PS-Poll
is heavily used
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/net/wireless/ath/ath9k/xmit.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 32891564ed67..ba39178a94ab 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2201,14 +2201,15 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
txq->stopped = true;
}
+ if (txctl->an)
+ tid = ath_get_skb_tid(sc, txctl->an, skb);
+
if (info->flags & IEEE80211_TX_CTL_PS_RESPONSE) {
ath_txq_unlock(sc, txq);
txq = sc->tx.uapsdq;
ath_txq_lock(sc, txq);
} else if (txctl->an &&
ieee80211_is_data_present(hdr->frame_control)) {
- tid = ath_get_skb_tid(sc, txctl->an, skb);
-
WARN_ON(tid->ac->txq != txctl->txq);
if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
--
1.9.0
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