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    Subject[PATCH 097/145] ath9k: Do not assign noise for NULL caldata
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    3.8.13.5 -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: Kamal Mostafa <kamal@canonical.com>
    ---
    drivers/net/wireless/ath/ath9k/calib.c | 1 -
    1 file changed, 1 deletion(-)

    diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
    index 1e85085..a393e87 100644
    --- 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, struct ath9k_channel *chan)

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

    --
    1.8.1.2


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