block: remove unnecessary condition check

Chengguang Xu · axboe · commit 62d2a1940709 · 2018-08-27T19:16:06.000-06:00
kmem_cache_destroy() can handle NULL pointer correctly, so there is
no need to check e-&gt;icq_cache before calling kmem_cache_destroy().

Signed-off-by: Chengguang Xu &lt;cgxu519@gmx.com&gt;
Signed-off-by: Jens Axboe &lt;axboe@kernel.dk&gt;
diff --git a/block/elevator.c b/block/elevator.c
@@ -895,8 +895,7 @@ int elv_register(struct elevator_type *e)
 	spin_lock(&elv_list_lock);
 	if (elevator_find(e->elevator_name, e->uses_mq)) {
 		spin_unlock(&elv_list_lock);
-		if (e->icq_cache)
-			kmem_cache_destroy(e->icq_cache);
+		kmem_cache_destroy(e->icq_cache);
 		return -EBUSY;
 	}
 	list_add_tail(&e->list, &elv_list);
