This is a note to let you know that I've just added the patch titled
leds: led-class: Add missing put_device() to led_put()
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
leds-led-class-add-missing-put_device-to-led_put.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9d1ba4e1752385f41e9beec3f1d688d924d6177c
Author: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Fri Jan 20 12:45:14 2023 +0100
leds: led-class: Add missing put_device() to led_put()
[ 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@xxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Lee Jones <lee@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230120114524.408368-2-hdegoede@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 6a8ea94834fa3..7391d2cf1370a 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);
