diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2023-01-20 12:45:14 +0100 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2023-01-27 11:06:03 +0000 |
| commit | 445110941eb94709216363f9d807d2508e64abd7 (patch) | |
| tree | fec469c845f20b01dc2b926fbcf705066e928d8d /drivers/leds/led-class.c | |
| parent | 1b929c02afd37871d5afb9d498426f83432e71c2 (diff) | |
| download | lwn-445110941eb94709216363f9d807d2508e64abd7.tar.gz lwn-445110941eb94709216363f9d807d2508e64abd7.zip | |
leds: led-class: Add missing put_device() to led_put()
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
Diffstat (limited to 'drivers/leds/led-class.c')
| -rw-r--r-- | drivers/leds/led-class.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 6a8ea94834fa..7391d2cf1370 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); |