This is a note to let you know that I've just added the patch titled
ath9k: fix ps-poll responses under a-mpdu sessions
to the 3.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ath9k-fix-ps-poll-responses-under-a-mpdu-sessions.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 558ff225de80ac95b132d3a115ddadcd64498b4f Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@xxxxxxxxxxx>
Date: Sat, 22 Feb 2014 13:48:19 +0100
Subject: ath9k: fix ps-poll responses under a-mpdu sessions
From: Felix Fietkau <nbd@xxxxxxxxxxx>
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/xmit.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2197,14 +2197,15 @@ int ath_tx_start(struct ieee80211_hw *hw
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)
Patches currently in stable-queue which might be from nbd@xxxxxxxxxxx are
queue-3.13/ath9k-fix-ps-poll-responses-under-a-mpdu-sessions.patch
queue-3.13/mac80211-send-control-port-protocol-frames-to-the-vo-queue.patch
queue-3.13/ath9k-fix-invalid-descriptor-discarding.patch
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