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| author |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-08-16 13:52:29 +0300 |
|---|---|---|
| committer |   Jacek Anaszewski <jacek.anaszewski@gmail.com> | 2019-08-26 20:03:58 +0200 |
| commit | 1dbb9fb4082ce2a2f1cf9596881ddece062d15d0 (patch) | |
| tree | 855d05e70b8bcd092c16fd1f82a1e6bd6bbe4b7b /drivers/leds | |
| parent | leds: lm3532: Add full scale current configuration (diff) | |
| download | linux-dev-1dbb9fb4082ce2a2f1cf9596881ddece062d15d0.tar.xz linux-dev-1dbb9fb4082ce2a2f1cf9596881ddece062d15d0.zip | |
leds: Allow to call led_classdev_unregister() unconditionally
If in the certain driver the LED is optional, and it's a majority of them,
the call of led_classdev_unregister() still requires some additional
checks.
The usual pattern on unregistering is to check for NULL, but we also check
for IS_ERR() in case device_create_with_groups() fails.
The change will reduce a burden in a lot of drivers to repeatedly check
for above conditions.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/led-class.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 052c7571e188..647b1263c579 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -287,6 +287,7 @@ int led_classdev_register_ext(struct device *parent, ret = led_add_brightness_hw_changed(led_cdev); if (ret) { device_unregister(led_cdev->dev); + led_cdev->dev = NULL; mutex_unlock(&led_cdev->led_access); return ret; } @@ -332,6 +333,9 @@ EXPORT_SYMBOL_GPL(led_classdev_register_ext); */ void led_classdev_unregister(struct led_classdev *led_cdev) { + if (IS_ERR_OR_NULL(led_cdev->dev)) + return; + #ifdef CONFIG_LEDS_TRIGGERS down_write(&led_cdev->trigger_lock); if (led_cdev->trigger) |