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    Subject[PATCH 3.14 47/83] ath9k: fix ready time of the multicast buffer queue
    Date
    3.14-stable review patch.  If anyone has any objections, please let me know.

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

    From: Felix Fietkau <nbd@openwrt.org>

    commit 3b3e0efb5c72c4fc940af50b33626b8a78a907dc upstream.

    qi->tqi_readyTime is written directly to registers that expect
    microseconds as unit instead of TU.
    When setting the CABQ ready time, cur_conf->beacon_interval is in TU, so
    convert it to microseconds before passing it to ath9k_hw.

    This should hopefully fix some Tx DMA issues with buffered multicast
    frames in AP mode.

    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/net/wireless/ath/ath9k/xmit.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/net/wireless/ath/ath9k/xmit.c
    +++ b/drivers/net/wireless/ath/ath9k/xmit.c
    @@ -1698,7 +1698,7 @@ int ath_cabq_update(struct ath_softc *sc

    ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi);

    - qi.tqi_readyTime = (cur_conf->beacon_interval *
    + qi.tqi_readyTime = (TU_TO_USEC(cur_conf->beacon_interval) *
    ATH_CABQ_READY_TIME) / 100;
    ath_txq_update(sc, qnum, &qi);




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