hwmon/smsc47b397: Don't report missing fans as spinning at 82 RPM
Jean Delvare [Sat, 23 Jun 2007 12:58:22 +0000 (14:58 +0200)]
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>

drivers/hwmon/smsc47b397.c

index 3b65b0e..45266b3 100644 (file)
@@ -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;
 }