From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 445110941eb94709216363f9d807d2508e64abd7 ]
led_put() is used to "undo" a successful of_led_get() call, of_led_get() uses class_find_device_by_of_node() which returns a reference to the device which must be free-ed with put_device() when the caller is done with it.
Add a put_device() call to led_put() to free the reference returned by class_find_device_by_of_node().
And also add a put_device() in the error-exit case of try_module_get() failing.
Fixes: 699a8c7c4bd3 ("leds: Add of_led_get() and led_put()") Reviewed-by: Andy Shevchenko andy.shevchenko@gmail.com Reviewed-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Lee Jones lee@kernel.org Link: https://lore.kernel.org/r/20230120114524.408368-2-hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/leds/led-class.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index f4bb02f6e0428..6e88df4c87fa8 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -241,8 +241,10 @@ struct led_classdev *of_led_get(struct device_node *np, int index)
led_cdev = dev_get_drvdata(led_dev);
- if (!try_module_get(led_cdev->dev->parent->driver->owner)) + if (!try_module_get(led_cdev->dev->parent->driver->owner)) { + put_device(led_cdev->dev); return ERR_PTR(-ENODEV); + }
return led_cdev; } @@ -255,6 +257,7 @@ EXPORT_SYMBOL_GPL(of_led_get); void led_put(struct led_classdev *led_cdev) { module_put(led_cdev->dev->parent->driver->owner); + put_device(led_cdev->dev); } EXPORT_SYMBOL_GPL(led_put);