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hwmon: (w83627ehf) Fix underflows seen when writing limit attributes

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DIV_ROUND_CLOSEST() after kstrtol() results in an underflow if a large
negative number such as -9223372036854775808 is provided by the user.
Fix it by reordering clamp_val() and DIV_ROUND_CLOSEST() operations.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2024-07-06 23:51:34 -07:00
parent 0403e10bf0
commit 5c1de37969
1 changed files with 2 additions and 2 deletions
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4
drivers/hwmon/w83627ehf.c
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@ -895,7 +895,7 @@ store_target_temp(struct device *dev, struct device_attribute *attr,
if (err < 0)
return err;
val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 127);
val = DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
mutex_lock(&data->update_lock);
data->target_temp[nr] = val;
@ -920,7 +920,7 @@ store_tolerance(struct device *dev, struct device_attribute *attr,
return err;
/* Limit the temp to 0C - 15C */
val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 15);
val = DIV_ROUND_CLOSEST(clamp_val(val, 0, 15000), 1000);
mutex_lock(&data->update_lock);
reg = w83627ehf_read_value(data, W83627EHF_REG_TOLERANCE[nr]);