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    Subject[ 80/95] carl9170: Fix memory accounting when sta is in power-save mode.
    3.2-stable review patch.  If anyone has any objections, please let me know.

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

    From: Nicolas Cavallari <Nicolas.Cavallari@lri.fr>

    commit 992d52529d7840236d3059b51c15d5eb9e81a869 upstream.

    On Access Point mode, when transmitting a packet, if the destination
    station is in powersave mode, we abort transmitting the packet to the
    device queue, but we do not reclaim the allocated memory. Given enough
    packets, we can go in a state where there is no packet on the device
    queue, but we think the device has no memory left, so no packet gets
    transmitted, connections breaks and the AP stops working.

    This undo the allocation done in the TX path when the station is in
    power-save mode.

    Signed-off-by: Nicolas Cavallari <cavallar@lri.fr>
    Acked-by: Christian Lamparter <chunkeey@googlemail.com>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/net/wireless/ath/carl9170/tx.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/net/wireless/ath/carl9170/tx.c
    +++ b/drivers/net/wireless/ath/carl9170/tx.c
    @@ -1251,6 +1251,7 @@ static bool carl9170_tx_ps_drop(struct a
    atomic_dec(&ar->tx_ampdu_upload);

    tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
    + carl9170_release_dev_space(ar, skb);
    carl9170_tx_status(ar, skb, false);
    return true;
    }



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