From: Rajkumar Manoharan Date: Fri, 1 Jul 2011 13:07:33 +0000 (+0530) Subject: ath9k: Fix tx throughput drops for AR9003 chips with AES encryption X-Git-Tag: v2.6.39.4~37 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=296c6a42eef092fbb2a1739864d538e5bc037628;p=thirdparty%2Fkernel%2Fstable.git ath9k: Fix tx throughput drops for AR9003 chips with AES encryption commit 4f6760b01bda625e9555e16d8e9ba8126a9c9498 upstream. 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. Signed-off-by: Rajkumar Manoharan Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 88fa7fdffd05d..4f2c8dfe4c1bc 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -662,7 +662,8 @@ 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; /*