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ath9k: fix aggregate size limit based on queue TXOP limit

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If the aggregate size exceeds the TXOP limit, it leads to lots of unnecessary
hardware and software retries.

The previous 4ms frame limit table was completely undocumented, the commit
that updated it only vaguely referenced and equation from the standard,
but I've been unable to replicate its results.

Fix this by using a formula based on the code in ath_pkt_duration, which is
more likely to be correct for this case.

Reported-by: Dave Täht <dave.taht@gmail.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau
2012-07-15 19:53:36 +02:00
committed by John W. Linville
parent 7702e788e7
commit aa5955c36f
3 changed files with 46 additions and 30 deletions
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1
drivers/net/wireless/ath/ath9k/main.c
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@@ -1395,6 +1395,7 @@ static int ath9k_conf_tx(struct ieee80211_hw *hw,
queue, txq->axq_qnum, params->aifs, params->cw_min,
params->cw_max, params->txop);
ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
ret = ath_txq_update(sc, txq->axq_qnum, &qi);
if (ret)
ath_err(common, "TXQ Update failed\n");