diff options
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/block/elevator.c b/block/elevator.c index 9276540af2a1..d6480e70816e 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -202,16 +202,15 @@ static void elevator_release(struct kobject *kobj) int elevator_init(struct request_queue *q) { struct elevator_type *e = NULL; - int err; + int err = 0; /* * q->sysfs_lock must be held to provide mutual exclusion between * elevator_switch() and here. */ - lockdep_assert_held(&q->sysfs_lock); - + mutex_lock(&q->sysfs_lock); if (unlikely(q->elevator)) - return 0; + goto out_unlock; /* * Use the default elevator specified by config boot param for @@ -237,7 +236,7 @@ int elevator_init(struct request_queue *q) if (q->nr_hw_queues == 1) e = elevator_get(q, "mq-deadline", false); if (!e) - return 0; + goto out_unlock; } else e = elevator_get(q, CONFIG_DEFAULT_IOSCHED, false); @@ -255,6 +254,8 @@ int elevator_init(struct request_queue *q) err = e->ops.sq.elevator_init_fn(q, e); if (err) elevator_put(e); +out_unlock: + mutex_unlock(&q->sysfs_lock); return err; } |