Also protects ourselves against a possible division by zero. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
@@ -174,6 +174,8 @@ static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
REG: count of 90kHz pulses / revolution */
static int fan_from_reg(u16 reg)
{
+ if (reg == 0 || reg == 0xffff)
+ return 0;
return 90000 * 60 / reg;
}