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Message-Id: <20140903220624.827352581@linuxfoundation.org>
Date: Wed, 3 Sep 2014 15:06:36 -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, Axel Lin <axel.lin@...ics.com>,
Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 3.16 039/125] hwmon: (sis5595) Prevent overflow problem when writing large limits
3.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Axel Lin <axel.lin@...ics.com>
commit cc336546ddca8c22de83720632431c16a5f9fe9a upstream.
On platforms with sizeof(int) < sizeof(long), writing a temperature
limit larger than MAXINT will result in unpredictable limit values
written to the chip. Avoid auto-conversion from long to int to fix
the problem.
Signed-off-by: Axel Lin <axel.lin@...ics.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/hwmon/sis5595.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/hwmon/sis5595.c
+++ b/drivers/hwmon/sis5595.c
@@ -159,7 +159,7 @@ static inline int TEMP_FROM_REG(s8 val)
{
return val * 830 + 52120;
}
-static inline s8 TEMP_TO_REG(int val)
+static inline s8 TEMP_TO_REG(long val)
{
int nval = clamp_val(val, -54120, 157530) ;
return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
--
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