From: Ian Dall <ian@beware.dropbear.id.au>
Date: Fri, 23 Apr 2010 17:17:53 +0000 (-0400)
Subject: w1: w1 temp: fix negative termperature calculation
X-Git-Tag: v2.6.34-rc6~46
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a6a1ecd9e9b5d046a236da2f7eb6b6812f04229;p=pandora-kernel.git

w1: w1 temp: fix negative termperature calculation

Fix regression caused by commit 507e2fbaaacb6f164b4125b87c5002f95143174b
("w1: w1 temp calculation overflow fix") whereby negative temperatures for
the DS18B20 are not converted properly.

When the temperature exceeds 32767 milli-degrees the temperature overflows
to -32768 millidegrees.  These are both well within the -55 - +125 degree
range for the sensor.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=12646

Signed-of-by: Ian Dall <ian@beware.dropbear.id.au>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Tested-by: Karsten Elfenbein <kelfe@gmx.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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