From: Vasanthakumar Thiagarajan <[email protected]> ------------------- This is a commit scheduled for the next v2.6.34 longterm release. If you see a problem with using this for longterm, please comment. -------------------
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 <[email protected]> Signed-off-by: Vasanthakumar Thiagarajan <[email protected]> Signed-off-by: John W. Linville <[email protected]> Signed-off-by: Paul Gortmaker <[email protected]> --- 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 83c7ea4..7f36731 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -172,8 +172,8 @@ 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)) -- 1.7.4.4 _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
