| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.13 030/149] ath9k: fix ps-poll responses under a-mpdu sessions | Date | Thu, 20 Mar 2014 17:03:13 -0700 |
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3.13-stable review patch. If anyone has any objections, please let me know.
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From: Felix Fietkau <nbd@openwrt.org>
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@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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)
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