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-rw-r--r--block/blk-sysfs.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 54d0db116153..fc41d83be22b 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -276,9 +276,12 @@ int blk_register_queue(struct gendisk *disk)
struct request_queue *q = disk->queue;
- if (!q || !q->request_fn)
+ if (WARN_ON(!q))
return -ENXIO;
+ if (!q->request_fn)
+ return 0;
+
ret = kobject_add(&q->kobj, kobject_get(&disk->dev.kobj),
"%s", "queue");
if (ret < 0)
@@ -300,7 +303,10 @@ void blk_unregister_queue(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
- if (q && q->request_fn) {
+ if (WARN_ON(!q))
+ return;
+
+ if (q->request_fn) {
elv_unregister_queue(q);
kobject_uevent(&q->kobj, KOBJ_REMOVE);