Commit 558ff225 authored Feb 22, 2014 by Felix Fietkau Committed by John W. Linville Feb 24, 2014

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>

parent e4ceb0f4

drivers/net/wireless/ath/ath9k/xmit.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -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)