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ath9k: Fix tx throughput drops for AR9003 chips with AES encryption

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While sending aggregated frames in AES, the AR5416 chips
required additional padding b/w subframes. This workaround
is not needed for edma (AR9003 family) chips. With this patch
~4Mbps thoughput improvement was observed in clear environment.

Cc: stable@kernel.org
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-07-01 18:37:33 +05:30 committed by John W. Linville
parent 06a86ddbf5
commit 4f6760b01b
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/ath/ath9k/xmit.c
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@ -671,7 +671,8 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
* TODO - this could be improved to be dependent on the rate.
* The hardware can keep up at lower rates, but not higher rates
*/
if (fi->keyix != ATH9K_TXKEYIX_INVALID)
if ((fi->keyix != ATH9K_TXKEYIX_INVALID) &&
!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA))
ndelim += ATH_AGGR_ENCRYPTDELIM;
/*