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| author | Jean Delvare <khali@linux-fr.org> | 2007-06-23 14:58:22 +0200 |
|---|---|---|
| committer | Mark M. Hoffman <mhoffman@lightlink.com> | 2007-07-19 14:22:16 -0400 |
| commit | 90205c6cbb8fd9880bf798903a99f5b8903455e2 (patch) | |
| tree | 16ee3e72a6c1f1d3dd13fe986aaa17128c108696 /drivers/hwmon/smsc47b397.c | |
| parent | 3faa1ffb4f4be7d10715f4b003ff7b27d14eae26 (diff) | |
| download | lwn-90205c6cbb8fd9880bf798903a99f5b8903455e2.tar.gz lwn-90205c6cbb8fd9880bf798903a99f5b8903455e2.zip | |
hwmon/smsc47b397: Don't report missing fans as spinning at 82 RPM
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>
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 3b65b0e61c49..45266b30ce1d 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; } |