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hwmon: (lm87) Fix overflow seen when writing voltage limit attributes 

Writes into voltage limit attributes can overflow due to an unbound
multiplication.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2016-12-04 18:16:02 -08:00
parent c0d04e9112
commit 12fa55ccc4
1 changed files with 1 additions and 1 deletions
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2
drivers/hwmon/lm87.c
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@ -121,7 +121,7 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \
(val) * 192 >= (scale) * 255 ? 255 : \
(val) >= (scale) * 255 / 192 ? 255 : \
((val) * 192 + (scale) / 2) / (scale))
#define TEMP_FROM_REG(reg) ((reg) * 1000)