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ath9k: fix ps-poll responses under a-mpdu sessions 

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

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2014-02-22 13:48:19 +01:00 committed by John W. Linville
parent e4ceb0f40d
commit 558ff225de
1 changed files with 3 additions and 2 deletions
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5
drivers/net/wireless/ath/ath9k/xmit.c
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@ -2186,14 +2186,15 @@ 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)