diff options
Diffstat (limited to 'block/blk-sysfs.c')
| -rw-r--r-- | block/blk-sysfs.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 870484eaed1f..9272452ff456 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -929,12 +929,17 @@ void blk_unregister_queue(struct gendisk *disk) if (WARN_ON(!q)) return; + /* + * Protect against the 'queue' kobj being accessed + * while/after it is removed. + */ mutex_lock(&q->sysfs_lock); - queue_flag_clear_unlocked(QUEUE_FLAG_REGISTERED, q); - mutex_unlock(&q->sysfs_lock); - wbt_exit(q); + spin_lock_irq(q->queue_lock); + queue_flag_clear(QUEUE_FLAG_REGISTERED, q); + spin_unlock_irq(q->queue_lock); + wbt_exit(q); if (q->mq_ops) blk_mq_unregister_dev(disk_to_dev(disk), q); @@ -946,4 +951,6 @@ void blk_unregister_queue(struct gendisk *disk) kobject_del(&q->kobj); blk_trace_remove_sysfs(disk_to_dev(disk)); kobject_put(&disk_to_dev(disk)->kobj); + + mutex_unlock(&q->sysfs_lock); } |