diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index bdbb6c31b4339279622816fae09995b22c6f509f..6c15f6e98e2e8be3563773a322b0cc9a5d5a22dd 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -575,8 +575,7 @@ static int blk_mq_init_sched_shared_sbitmap(struct request_queue *queue)
 					&queue->sched_breserved_tags;
 	}
 
-	sbitmap_queue_resize(&queue->sched_bitmap_tags,
-			     queue->nr_requests - set->reserved_tags);
+	blk_mq_tag_update_sched_shared_sbitmap(queue);
 
 	return 0;
 }
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index ff5caeb825429d91c3f6bf58af68d91fc50b222d..55b5a226dcc09258b7910ca9ab94f7b82714e3f9 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -634,6 +634,12 @@ void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set, unsigned int s
 	sbitmap_queue_resize(&set->__bitmap_tags, size - set->reserved_tags);
 }
 
+void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q)
+{
+	sbitmap_queue_resize(&q->sched_bitmap_tags,
+			     q->nr_requests - q->tag_set->reserved_tags);
+}
+
 /**
  * blk_mq_unique_tag() - return a tag that is unique queue-wide
  * @rq: request for which to compute a unique tag
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index f0a0ee758a5566584579ce0f26f2cab2bbfe6802..a9f5f18248198feb029135f97c3997c8d752a5a6 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -50,6 +50,7 @@ extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
 					unsigned int depth, bool can_grow);
 extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set,
 					     unsigned int size);
+extern void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q);
 
 extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
 void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 38cffe362a29e988996789c16dcdc4af3c591ebc..59bbfc935d8745839b8c86552d071925f2b85371 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3650,8 +3650,7 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr)
 		q->nr_requests = nr;
 		if (blk_mq_is_sbitmap_shared(set->flags)) {
 			if (q->elevator)
-				sbitmap_queue_resize(&q->sched_bitmap_tags,
-						     nr - set->reserved_tags);
+				blk_mq_tag_update_sched_shared_sbitmap(q);
 			else
 				blk_mq_tag_resize_shared_sbitmap(set, nr);
 		}