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| author | Axel Lin <axel.lin@ingics.com> | 2014-08-02 13:36:38 +0800 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-09-03 21:31:21 +0200 |
| commit | b800e2f89990e68cba2ce8f6fe07b9c39af8f2f1 (patch) | |
| tree | 6bf0b5900ac09cffc015b734a0c7085ef137a574 /drivers/hwmon | |
| parent | 80dc972c163e1638012e5b8f6adac0745cc53678 (diff) | |
| download | linux-stable-b800e2f89990e68cba2ce8f6fe07b9c39af8f2f1.tar.gz linux-stable-b800e2f89990e68cba2ce8f6fe07b9c39af8f2f1.tar.bz2 linux-stable-b800e2f89990e68cba2ce8f6fe07b9c39af8f2f1.zip | |
hwmon: (gpio-fan) Prevent overflow problem when writing large limits
commit 2565fb05d1e9fc0831f7b1c083bcfcb1cba1f020 upstream.
On platforms with sizeof(int) < sizeof(unsigned long), writing a rpm value
larger than MAXINT will result in unpredictable limit values written to the
chip. Avoid auto-conversion from unsigned long to int to fix the problem.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/gpio-fan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c index b7d6a5704eb2..ee21bdd610ee 100644 --- a/drivers/hwmon/gpio-fan.c +++ b/drivers/hwmon/gpio-fan.c @@ -172,7 +172,7 @@ static int get_fan_speed_index(struct gpio_fan_data *fan_data) return -EINVAL; } -static int rpm_to_speed_index(struct gpio_fan_data *fan_data, int rpm) +static int rpm_to_speed_index(struct gpio_fan_data *fan_data, unsigned long rpm) { struct gpio_fan_speed *speed = fan_data->speed; int i; |