Commit 700c6ea2 authored by Adam Nielsen's avatar Adam Nielsen Committed by Richard Purdie

leds: Prevent multiple LED triggers with the same name

Signed-off-by: default avatarAdam Nielsen <a.nielsen@shikadi.net>
Signed-off-by: default avatarRichard Purdie <rpurdie@linux.intel.com>
parent 17354bfe
......@@ -156,12 +156,20 @@ EXPORT_SYMBOL_GPL(led_trigger_set_default);
int led_trigger_register(struct led_trigger *trigger)
{
struct led_classdev *led_cdev;
struct led_trigger *trig;
rwlock_init(&trigger->leddev_list_lock);
INIT_LIST_HEAD(&trigger->led_cdevs);
/* Add to the list of led triggers */
down_write(&triggers_list_lock);
/* Make sure the trigger's name isn't already in use */
list_for_each_entry(trig, &trigger_list, next_trig) {
if (!strcmp(trig->name, trigger->name)) {
up_write(&triggers_list_lock);
return -EEXIST;
}
}
/* Add to the list of led triggers */
list_add_tail(&trigger->next_trig, &trigger_list);
up_write(&triggers_list_lock);
......
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