linux-kernel - [1/1] w1: w1 temp calculation overflow fix.

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Message-ID: <20090209214217.GA14958@ioremap.net>
Date:	Tue, 10 Feb 2009 00:42:17 +0300
From:	Evgeniy Polyakov <zbr@...emap.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Ian Dall <ian@...are.dropbear.id.au>
Subject: [1/1] w1: w1 temp calculation overflow fix.

Signed-off-by: Ian Dall <ian@...are.dropbear.id.au>
Signed-off-by: Evgeniy Polyakov <zbr@...emap.net>

diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
index 2c8dff9..1ed3d55 100644
--- a/drivers/w1/slaves/w1_therm.c
+++ b/drivers/w1/slaves/w1_therm.c
@@ -115,7 +115,7 @@ static struct w1_therm_family_converter w1_therm_families[] = {
 
 static inline int w1_DS18B20_convert_temp(u8 rom[9])
 {
-	s16 t = (rom[1] << 8) | rom[0];
+	int t = ((s16)rom[1] << 8) | rom[0];
 	t = t*1000/16;
 	return t;
 }


-- 
	Evgeniy Polyakov
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