leds: various: fix OF node leaks

Fix OF node leaks by calling of_node_put in
for_each_available_child_of_node when the cycle breaks or returns.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Nikita Travkin <nikitos.tr@gmail.com>
Cc: Milo Kim <milo.kim@ti.com>
Cc: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Not-for-stable: untested, theoretical, insignificant leaks

drivers/leds/leds-aw2013.c

@@ -305,8 +305,10 @@ static int aw2013_probe_dt(struct aw2013 *chip)
 
 		ret = devm_led_classdev_register_ext(&chip->client->dev,
 						     &led->cdev, &init_data);
-		if (ret < 0)
+		if (ret < 0) {
+			of_node_put(child);
 			return ret;
+		}
 
 		i++;
 	}

drivers/leds/leds-lp55xx-common.c

@@ -614,8 +614,10 @@ static int lp55xx_parse_multi_led(struct device_node *np,
 	for_each_available_child_of_node(np, child) {
 		ret = lp55xx_parse_multi_led_child(child, cfg, child_number,
 						   num_colors);
-		if (ret)
+		if (ret) {
+			of_node_put(child);
 			return ret;
+		}
 		num_colors++;
 	}
 
@@ -681,8 +683,10 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
 
 	for_each_available_child_of_node(np, child) {
 		ret = lp55xx_parse_logical_led(child, cfg, i);
-		if (ret)
+		if (ret) {
+			of_node_put(child);
 			return ERR_PTR(-EINVAL);
+		}
 		i++;
 	}
 

drivers/leds/leds-turris-omnia.c

@@ -236,8 +236,10 @@ static int omnia_leds_probe(struct i2c_client *client,
 	led = &leds->leds[0];
 	for_each_available_child_of_node(np, child) {
 		ret = omnia_led_register(client, led, child);
-		if (ret < 0)
+		if (ret < 0) {
+			of_node_put(child);
 			return ret;
+		}
 
 		led += ret;
 	}