diff options
Diffstat (limited to 'drivers/hwmon/smsc47b397.c')
| -rw-r--r-- | drivers/hwmon/smsc47b397.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c index 3b65b0e61c4..45266b30ce1 100644 --- a/drivers/hwmon/smsc47b397.c +++ b/drivers/hwmon/smsc47b397.c @@ -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; } |