diff options
| -rw-r--r-- | block/blk-sysfs.c | 2 | ||||
| -rw-r--r-- | block/elevator.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 27aceab1cc31..b8362c0df51d 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -931,7 +931,9 @@ void blk_unregister_queue(struct gendisk *disk) if (WARN_ON(!q)) return; + mutex_lock(&q->sysfs_lock); queue_flag_clear_unlocked(QUEUE_FLAG_REGISTERED, q); + mutex_unlock(&q->sysfs_lock); wbt_exit(q); diff --git a/block/elevator.c b/block/elevator.c index 4bb2f0c93fa6..153926a90901 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -1055,6 +1055,10 @@ static int __elevator_change(struct request_queue *q, const char *name) char elevator_name[ELV_NAME_MAX]; struct elevator_type *e; + /* Make sure queue is not in the middle of being removed */ + if (!test_bit(QUEUE_FLAG_REGISTERED, &q->queue_flags)) + return -ENOENT; + /* * Special case for mq, turn off scheduling */ |