mediatek: mt76: mac80211: Fix missing of_node_put() in mt76_led_init()

stable inclusion
from stable-v5.10.137
commit 9aa4ad5ccabcfc906c77dbc7d0e2b2c28f1357c6
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9aa4ad5ccabcfc906c77dbc7d0e2b2c28f1357c6

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

[ Upstream commit 0a14c1d0 ]

We should use of_node_put() for the reference 'np' returned by
of_get_child_by_name() which will increase the refcount.

Fixes: 17f1de56 ("mt76: add common code shared between multiple chipsets")
Signed-off-by: NLiang He <windhl@126.com>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>

drivers/net/wireless/mediatek/mt76/mac80211.c

@@ -107,6 +107,7 @@ static int mt76_led_init(struct mt76_dev *dev)
 		if (!of_property_read_u32(np, "led-sources", &led_pin))
 			dev->led_pin = led_pin;
 		dev->led_al = of_property_read_bool(np, "led-active-low");
+		of_node_put(np);
 	}
 
 	return led_classdev_register(dev->dev, &dev->led_cdev);