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    Subject[patch 055/176] ath9k: Fix bug in delimiter padding computation
    2.6.36-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Vasanthakumar Thiagarajan <vasanth@atheros.com>

    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>

    ---
    drivers/net/wireless/ath/ath9k/ath9k.h | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    --- a/drivers/net/wireless/ath/ath9k/ath9k.h
    +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
    @@ -177,8 +177,8 @@ void ath_descdma_cleanup(struct ath_soft

    /* 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))



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