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authorRajkumar Manoharan <rmanohar@qca.qualcomm.com>2011-07-01 18:37:33 +0530
committerJohn W. Linville <linville@tuxdriver.com>2011-07-05 14:42:37 -0400
commit4f6760b01bda625e9555e16d8e9ba8126a9c9498 (patch)
treeb33630e6ef280e8a4e2fd50113c62be445db5248 /drivers/net
parent06a86ddbf557cb8a0f7ded54e872e9d456002d52 (diff)
downloadblackbird-op-linux-4f6760b01bda625e9555e16d8e9ba8126a9c9498.tar.gz
blackbird-op-linux-4f6760b01bda625e9555e16d8e9ba8126a9c9498.zip
ath9k: Fix tx throughput drops for AR9003 chips with AES encryption
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/ath/ath9k/xmit.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 3779b8977d47..33443bcaa8d9 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -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;
/*
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