linux-kernel - [ 07/59] ath9k: Do not assign noise for NULL caldata

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Message-Id: <20130726205014.587411687@linuxfoundation.org>
Date:	Fri, 26 Jul 2013 13:52:31 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Sujith Manoharan <c_manoha@....qualcomm.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [ 07/59] ath9k: Do not assign noise for NULL caldata

3.4-stable review patch.  If anyone has any objections, please let me know.

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

From: Sujith Manoharan <c_manoha@....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@....qualcomm.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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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