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

Ian Pilcher
2021-09-03T20:46:16Z

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 <arequipeno@gmail.com>
---
drivers/leds/trigger/ledtrig-blkdev.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)

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);
+}
--
2.31.1