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ath9k: Fix bug in delimiter padding computation 

There is a roundng error in delimiter padding computation
which causes severe throughput drop with some of AR9003.

signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Cc:stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2010-11-10 05:03:15 -08:00 committed by John W. Linville
parent bc2068020b
commit 39ec2997c3
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/ath/ath9k/ath9k.h
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@ -177,8 +177,8 @@ void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd,
/* returns delimiter padding required given the packet length */
#define ATH_AGGR_GET_NDELIM(_len) \
(((((_len) + ATH_AGGR_DELIM_SZ) < ATH_AGGR_MINPLEN) ? \
(ATH_AGGR_MINPLEN - (_len) - ATH_AGGR_DELIM_SZ) : 0) >> 2)
(((_len) >= ATH_AGGR_MINPLEN) ? 0 : \
DIV_ROUND_UP(ATH_AGGR_MINPLEN - (_len), ATH_AGGR_DELIM_SZ))
#define BAW_WITHIN(_start, _bawsz, _seqno) \
((((_seqno) - (_start)) & 4095) < (_bawsz))