hwmon: (emc2103) Fix return value

kstrtol() returns appropriate error values. Use those instead of
hardcoding. Silences several sparse messages of following type:
"why not propagate 'result' from kstrtol() instead of (-22)?"
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/emc2103.c

@@ -248,7 +248,7 @@ static ssize_t set_temp_min(struct device *dev, struct device_attribute *da,
 
 	int result = kstrtol(buf, 10, &val);
 	if (result < 0)
-		return -EINVAL;
+		return result;
 
 	val = DIV_ROUND_CLOSEST(val, 1000);
 	if ((val < -63) || (val > 127))
@@ -272,7 +272,7 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *da,
 
 	int result = kstrtol(buf, 10, &val);
 	if (result < 0)
-		return -EINVAL;
+		return result;
 
 	val = DIV_ROUND_CLOSEST(val, 1000);
 	if ((val < -63) || (val > 127))
@@ -320,7 +320,7 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
 
 	int status = kstrtol(buf, 10, &new_div);
 	if (status < 0)
-		return -EINVAL;
+		return status;
 
 	if (new_div == old_div) /* No change */
 		return count;
@@ -394,7 +394,7 @@ static ssize_t set_fan_target(struct device *dev, struct device_attribute *da,
 
 	int result = kstrtol(buf, 10, &rpm_target);
 	if (result < 0)
-		return -EINVAL;
+		return result;
 
 	/* Datasheet states 16384 as maximum RPM target (table 3.2) */
 	if ((rpm_target < 0) || (rpm_target > 16384))
@@ -440,7 +440,7 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *da,
 
 	int result = kstrtol(buf, 10, &new_value);
 	if (result < 0)
-		return -EINVAL;
+		return result;
 
 	mutex_lock(&data->update_lock);
 	switch (new_value) {