It is a usual pattern in the kernel to make releasing functions be NULL-aware
so they become a no-op. This helps reducing unneeded checks in the code where
the given resource is optional.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/leds/led-class.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index cad55e2beafa..b53ebe3a0faa 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -421,6 +421,9 @@ EXPORT_SYMBOL_GPL(led_add_lookup);
  */
 void led_remove_lookup(struct led_lookup_data *led_lookup)
 {
+	if (!led_lookup)
+		return;
+
 	mutex_lock(&leds_lookup_lock);
 	list_del(&led_lookup->list);
 	mutex_unlock(&leds_lookup_lock);
-- 
2.50.1