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ath9k: Fix TX filter usage

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The TX filter bit for a station would be set by the HW
when a frame is not acked. A frame would be completed with
ATH9K_TXERR_FILT status only when the corresponding filter bit
for the destination station is already set.

Currently, un-acknowledged  packets are added to the pending queue
and retried, but the "clear_dest_mask" bit in the descriptor is
set only when the TX status has been ATH9K_TXERR_FILT. This results
in packet loss and the log shows:

wlan0: dropped TX filtered frame, queue_len=0 PS=0 @4309746071
wlan0: dropped TX filtered frame, queue_len=0 PS=0 @4309746076
wlan0: dropped TX filtered frame, queue_len=0 PS=0 @4309746377
...
...

This issue can be resolved by making sure that the destination
mask is cleared when the packet is being retried and the earlier
TX status is ATH9K_TXERR_XRETRY.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2012-08-29 09:20:42 +05:30 committed by John W. Linville
parent 6babc283c1
commit adfbda6224
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/ath9k/xmit.c
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@ -568,7 +568,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
if (!an->sleeping) {
ath_tx_queue_tid(txq, tid);
if (ts->ts_status & ATH9K_TXERR_FILT)
if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY))
tid->ac->clear_ps_filter = true;
}
}