[14/18] ledtrig-blkdev: Add function to disassociate an LED from the trigger

Commit Message

Ian Pilcher Sept. 3, 2021, 8:45 p.m. UTC

Remove all device associations with this LED

Remove /sys/class/leds/<led>/block_devices directory

Free per-LED data structure

Decrement module reference count

Signed-off-by: Ian Pilcher <[e-mail]>
---
 drivers/leds/trigger/ledtrig-blkdev.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

Patch

diff --git a/drivers/leds/trigger/ledtrig-blkdev.c b/drivers/leds/trigger/ledtrig-blkdev.c
index 1be9de431c08..b2ec85b805d0 100644
--- a/drivers/leds/trigger/ledtrig-blkdev.c
+++ b/drivers/leds/trigger/ledtrig-blkdev.c
@@ -482,3 +482,30 @@  static void blkdev_disk_cleanup(struct gendisk *const gd)
 				  &gd->ledtrig->leds, disk_leds_node)
 		blkdev_disk_del_locked(link->led, link, gd->ledtrig);
 }
+
+
+/*
+ *
+ *	Disassociate an LED from the trigger
+ *
+ */
+
+static void blkdev_deactivate(struct led_classdev *const led_dev)
+{
+	struct ledtrig_blkdev_led *const led = led_get_trigger_data(led_dev);
+	struct ledtrig_blkdev_link *link;
+	struct hlist_node *next;
+
+	mutex_lock(&ledtrig_blkdev_mutex);
+
+	hlist_for_each_entry_safe(link, next, &led->disks, led_disks_node)
+		blkdev_disk_del_locked(led, link, link->disk);
+
+	hlist_del(&led->leds_node);
+	kobject_put(led->dir);
+	kfree(led);
+
+	mutex_unlock(&ledtrig_blkdev_mutex);
+
+	module_put(THIS_MODULE);
+}