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hwmon: (adt7470) Fix writes to temperature limit registers 

commit de12d6f4b1 upstream.

Temperature limit registers are signed. Limits therefore need
to be clamped to (-128, 127) degrees C and not to (0, 255)
degrees C.

Without this fix, writing a limit of 128 degrees C sets the
actual limit to -128 degrees C.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Guenter Roeck 2014-07-16 17:40:31 -07:00 committed by Greg Kroah-Hartman
parent 2fd37381b1
commit ee0af1ad51
1 changed files with 3 additions and 3 deletions
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6
drivers/hwmon/adt7470.c
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@ -515,7 +515,7 @@ static ssize_t set_temp_min(struct device *dev,
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
temp = clamp_val(temp, 0, 255);
temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
@ -549,7 +549,7 @@ static ssize_t set_temp_max(struct device *dev,
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
temp = clamp_val(temp, 0, 255);
temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
@ -826,7 +826,7 @@ static ssize_t set_pwm_tmin(struct device *dev,
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
temp = clamp_val(temp, 0, 255);
temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->pwm_tmin[attr->index] = temp;