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    Subject[ 07/59] ath9k: Do not assign noise for NULL caldata
    Date
    3.4-stable review patch.  If anyone has any objections, please let me know.

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

    From: Sujith Manoharan <c_manoha@qca.qualcomm.com>

    commit d3bcb7b24bbf09fde8405770e676fe0c11c79662 upstream.

    ah->noise is maintained globally and not per-channel. This
    is updated in the reset() routine after the NF history has been
    filled for the *current channel*, just before switching to
    the new channel. There is no need to do it inside getnf(), since
    ah->noise must contain a value for the new channel.

    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/net/wireless/ath/ath9k/calib.c | 1 -
    1 file changed, 1 deletion(-)

    --- a/drivers/net/wireless/ath/ath9k/calib.c
    +++ b/drivers/net/wireless/ath/ath9k/calib.c
    @@ -389,7 +389,6 @@ bool ath9k_hw_getnf(struct ath_hw *ah, s

    if (!caldata) {
    chan->noisefloor = nf;
    - ah->noise = ath9k_hw_getchan_noise(ah, chan);
    return false;
    }




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