leds: simple_strtoul() cleanup

led-class.c and ledtrig-timer.c still use simple_strtoul().  Change them
to use kstrtoul() instead of obsolete simple_strtoul().

Also fix the existing int ret declaration to be ssize_t to match the
return type for _store functions in ledtrig-timer.c.
Signed-off-by: Shuah Khan <shuahkhan@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Bryan Wu <bryan.wu@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/leds/led-class.c

@@ -44,23 +44,18 @@ static ssize_t led_brightness_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
+	unsigned long state;
 	ssize_t ret = -EINVAL;
-	char *after;
-	unsigned long state = simple_strtoul(buf, &after, 10);
-	size_t count = after - buf;
 
-	if (isspace(*after))
-		count++;
-
-	if (count == size) {
-		ret = count;
+	ret = kstrtoul(buf, 10, &state);
+	if (ret)
+		return ret;
 
 	if (state == LED_OFF)
 		led_trigger_remove(led_cdev);
 	led_set_brightness(led_cdev, state);
-	}
 
-	return ret;
+	return size;
 }
 
 static ssize_t led_max_brightness_show(struct device *dev,

drivers/leds/ledtrig-timer.c

@@ -31,21 +31,17 @@ static ssize_t led_delay_on_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	int ret = -EINVAL;
-	char *after;
-	unsigned long state = simple_strtoul(buf, &after, 10);
-	size_t count = after - buf;
+	unsigned long state;
+	ssize_t ret = -EINVAL;
 
-	if (isspace(*after))
-		count++;
+	ret = kstrtoul(buf, 10, &state);
+	if (ret)
+		return ret;
 
-	if (count == size) {
 	led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
 	led_cdev->blink_delay_on = state;
-		ret = count;
-	}
 
-	return ret;
+	return size;
 }
 
 static ssize_t led_delay_off_show(struct device *dev,
@@ -60,21 +56,17 @@ static ssize_t led_delay_off_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
-	int ret = -EINVAL;
-	char *after;
-	unsigned long state = simple_strtoul(buf, &after, 10);
-	size_t count = after - buf;
+	unsigned long state;
+	ssize_t ret = -EINVAL;
 
-	if (isspace(*after))
-		count++;
+	ret = kstrtoul(buf, 10, &state);
+	if (ret)
+		return ret;
 
-	if (count == size) {
 	led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
 	led_cdev->blink_delay_off = state;
-		ret = count;
-	}
 
-	return ret;
+	return size;
 }
 
 static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);