hwmon: (adt7470) Fix overflows seen when writing into limit attributes
Fix overflows seen when writing large values into various temperature limit
attributes.
The input value passed to DIV_ROUND_CLOSEST() needs to be clamped to avoid
such overflows.
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c
index 6e60ca5..c9a1d9c 100644
--- a/drivers/hwmon/adt7470.c
+++ b/drivers/hwmon/adt7470.c
@@ -483,8 +483,8 @@ static ssize_t set_temp_min(struct device *dev,
if (kstrtol(buf, 10, &temp))
return -EINVAL;
+ temp = clamp_val(temp, -128000, 127000);
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
@@ -517,8 +517,8 @@ static ssize_t set_temp_max(struct device *dev,
if (kstrtol(buf, 10, &temp))
return -EINVAL;
+ temp = clamp_val(temp, -128000, 127000);
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
@@ -880,8 +880,8 @@ static ssize_t set_pwm_tmin(struct device *dev,
if (kstrtol(buf, 10, &temp))
return -EINVAL;
+ temp = clamp_val(temp, -128000, 127000);
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->pwm_tmin[attr->index] = temp;