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| author | Guenter Roeck <linux@roeck-us.net> | 2012-06-18 22:37:13 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2012-07-21 21:48:44 -0700 |
| commit | 27c4db3996ef0d27fb25e6991ebf6e507a920937 (patch) | |
| tree | bac3effb30b62185d86cb1f36a98eec7204a17f6 /drivers/hwmon/acpi_power_meter.c | |
| parent | 27f8b1355504744e7cfbb5756f120734d58644a8 (diff) | |
| download | linux-27c4db3996ef0d27fb25e6991ebf6e507a920937.tar.gz linux-27c4db3996ef0d27fb25e6991ebf6e507a920937.tar.bz2 linux-27c4db3996ef0d27fb25e6991ebf6e507a920937.zip | |
hwmon: (acpi_power_meter) Cleanup and optimizations
An unsigned value can not be smaller than 0. Remove the check for it.
Use DIV_ROUND_CLOSEST for divide operations converting milli-degrees C into
degrees C. Limit maximum accepted trip point temperature to INT_MAX.
This patch fixes Coverity #115214: Unsigned compared against 0
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/acpi_power_meter.c')
| -rw-r--r-- | drivers/hwmon/acpi_power_meter.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/hwmon/acpi_power_meter.c b/drivers/hwmon/acpi_power_meter.c index 34ad5a27a7e9..9a0821f1c914 100644 --- a/drivers/hwmon/acpi_power_meter.c +++ b/drivers/hwmon/acpi_power_meter.c @@ -237,7 +237,7 @@ static ssize_t set_cap(struct device *dev, struct device_attribute *devattr, if (res) return res; - temp /= 1000; + temp = DIV_ROUND_CLOSEST(temp, 1000); if (temp > resource->caps.max_cap || temp < resource->caps.min_cap) return -EINVAL; arg0.integer.value = temp; @@ -307,8 +307,8 @@ static ssize_t set_trip(struct device *dev, struct device_attribute *devattr, if (res) return res; - temp /= 1000; - if (temp < 0) + temp = DIV_ROUND_CLOSEST(temp, 1000); + if (temp > INT_MAX) return -EINVAL; mutex_lock(&resource->lock); |