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| author | Vasanthakumar Thiagarajan <vasanth@atheros.com> | 2010-11-10 05:03:15 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 15:13:54 -0800 |
| commit | a7252d2d9faf2e2c32131cd94de738456680b153 (patch) | |
| tree | 58da7b915aafaf92f7e78db97e8bc2bfe7f4889f | |
| parent | 41c51e331175582c065ea044ab05210dcc0f9799 (diff) | |
| download | linux-hpc-a7252d2d9faf2e2c32131cd94de738456680b153.tar.gz | |
ath9k: Fix bug in delimiter padding computation
commit 39ec2997c374b528cdbf65099b6d6b8593a67f7f upstream.
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>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ath9k.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 0963071e8f908c..c0b60ce38dfec9 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -178,8 +178,8 @@ 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)) |