| Message ID | 20230119130053.111344-2-hdegoede@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | leds: lookup-table support + int3472/media privacy LED support | expand |
On Thu, Jan 19, 2023 at 3:01 PM Hans de Goede <hdegoede@redhat.com> wrote: > > 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. This sounds to me like a bugfix. Why not the Fixes tag? Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > 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 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); > > -- > 2.39.0 >
On Thu, Jan 19, 2023 at 2:01 PM Hans de Goede <hdegoede@redhat.com> wrote: > 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. > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij
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);
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. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/leds/led-class.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)