leds: led-core: Fix refcount leak in of_led_get()

[ Upstream commit da1afe8e6099980fe1e2fd7436dca284af9d3f29 ]

class_find_device_by_of_node() calls class_find_device(), it will take
the reference, use the put_device() to drop the reference when not need
anymore.

Fixes: 699a8c7c4bd3 ("leds: Add of_led_get() and led_put()")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20221220121807.1543790-1-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 7391d2c..aa39b2a 100644 (file)
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -235,6 +235,7 @@ struct led_classdev *of_led_get(struct device_node *np, int index)
 
        led_dev = class_find_device_by_of_node(leds_class, led_node);
        of_node_put(led_node);
+       put_device(led_dev);
 
        if (!led_dev)
                return ERR_PTR(-EPROBE_DEFER);