diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index a07ca3488d96..bf356de30134 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -481,6 +481,14 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
 	struct blk_mq_hw_ctx *hctx;
 	int i;
 
+	/*
+	 * Avoid potential races with things like queue removal.
+	 */
+	rcu_read_lock();
+	if (percpu_ref_is_zero(&q->q_usage_counter)) {
+		rcu_read_unlock();
+		return;
+	}
 
 	queue_for_each_hw_ctx(q, hctx, i) {
 		struct blk_mq_tags *tags = hctx->tags;
@@ -497,7 +505,7 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
 		bt_for_each(hctx, &tags->bitmap_tags, tags->nr_reserved_tags, fn, priv,
 		      false);
 	}
-
+	rcu_read_unlock();
 }
 
 static unsigned int bt_unused_tags(struct blk_mq_bitmap_tags *bt)