leds: lt3593: Put fwnode in any case during ->probe()

stable inclusion
from stable-5.10.65
commit 917191d582f965958232673daa8c3369db6ad706
bugzilla: 182361 https://gitee.com/openeuler/kernel/issues/I4EH3U

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=917191d582f965958232673daa8c3369db6ad706

--------------------------------

[ Upstream commit 7e1baaaa ]

device_get_next_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

Fixes: 8cd7d6da ("leds: lt3593: Add device tree probing glue")
Cc: Daniel Mack <daniel@zonque.org>
Signed-off-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/leds/leds-lt3593.c

@@ -99,10 +99,9 @@ static int lt3593_led_probe(struct platform_device *pdev)
 	init_data.default_label = ":";
 
 	ret = devm_led_classdev_register_ext(dev, &led_data->cdev, &init_data);
-	if (ret < 0) {
 	fwnode_handle_put(child);
+	if (ret < 0)
 		return ret;
-	}
 
 	platform_set_drvdata(pdev, led_data);