ctx->sched_tags) {
-			ret = blk_mq_tag_update_depth(hctx, &hctx->sched_tags,
-						      nr);
-		} else {
-			ret = blk_mq_tag_update_depth(hctx, &hctx->tags, nr);
-		}
-		if (ret)
-			goto out;
-	}
-
-	q->nr_requests = nr;
-	if (q->elevator && q->elevator->type->ops.depth_updated)
-		q->elevator->type->ops.depth_updated(q);
-
 	if (blk_mq_is_shared_tags(set->flags)) {
 		if (q->elevator)
 			blk_mq_tag_update_sched_shared_tags(q);
 		else
 			blk_mq_tag_resize_shared_tags(set, nr);
+	} else {
+		queue_for_each_hw_ctx(q, hctx, i) {
+			if (!hctx->tags)
+				continue;
+			/*
+			 * If we're using an MQ scheduler, just update the
+			 * scheduler queue depth. This is similar to what the
+			 * old code would do.
+			 */
+			if (hctx->sched_tags)
+				ret = blk_mq_tag_update_depth(hctx,
+							&hctx->sched_tags, nr);
+			else
+				ret = blk_mq_tag_update_depth(hctx,
+							&hctx->tags, nr);
+			if (ret)
+				goto out;
+		}
 	}
 
+	q->nr_requests = nr;
+	if (q->elevator && q->elevator->type->ops.depth_updated)
+		q->elevator->type->ops.depth_updated(q);
+
 out:
 	blk_mq_unquiesce_queue(q);
 
-- 
2.51.0[PATCH 6.17 128/563] blk-mq: cleanup shared tags case in blk_mq_update_nr_requests()Greg Kroah-Hartman <gregkh@linuxfoundation.org> undefinedstable@vger.kernel.org undefined undefined undefined undefined undefined undefined�