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>

parent c0d04e91

drivers/hwmon/lm87.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)