Bluetooth: Use managed version of led_trigger_register in LED trigger

Recently a managed version of led_trigger_register was introduced.
Using devm_led_trigger_register allows to simplify the LED trigger code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_core.c

@@ -3134,8 +3134,6 @@ void hci_unregister_dev(struct hci_dev *hdev)
 
 	id = hdev->id;
 
-	hci_leds_exit(hdev);
-
 	write_lock(&hci_dev_list_lock);
 	list_del(&hdev->list);
 	write_unlock(&hci_dev_list_lock);

net/bluetooth/leds.c

@@ -55,7 +55,7 @@ static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
 	if (!htrig->led_trigger.name)
 		goto err_alloc;
 
-	if (led_trigger_register(&htrig->led_trigger))
+	if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
 		goto err_register;
 
 	return &htrig->led_trigger;
@@ -72,9 +72,3 @@ void hci_leds_init(struct hci_dev *hdev)
 	/* initialize power_led */
 	hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
 }
-
-void hci_leds_exit(struct hci_dev *hdev)
-{
-	if (hdev->power_led)
-		led_trigger_unregister(hdev->power_led);
-}

net/bluetooth/leds.h

@@ -9,10 +9,8 @@
 #if IS_ENABLED(CONFIG_BT_LEDS)
 void hci_leds_update_powered(struct hci_dev *hdev, bool enabled);
 void hci_leds_init(struct hci_dev *hdev);
-void hci_leds_exit(struct hci_dev *hdev);
 #else
 static inline void hci_leds_update_powered(struct hci_dev *hdev,
 					   bool enabled) {}
 static inline void hci_leds_init(struct hci_dev *hdev) {}
-static inline void hci_leds_exit(struct hci_dev *hdev) {}
 #endif