--- zzzz-none-000/linux-5.4.213/drivers/md/dm-table.c	2022-09-15 10:04:56.000000000 +0000
+++ miami-7690-761/linux-5.4.213/drivers/md/dm-table.c	2024-05-29 11:19:51.000000000 +0000
@@ -928,15 +928,21 @@
 	return true;
 }
 
-static int device_is_rq_stackable(struct dm_target *ti, struct dm_dev *dev,
-				  sector_t start, sector_t len, void *data)
+struct verify_rq_based_data {
+	unsigned sq_count;
+	unsigned mq_count;
+};
+
+static int device_is_rq_based(struct dm_target *ti, struct dm_dev *dev,
+			      sector_t start, sector_t len, void *data)
 {
-	struct block_device *bdev = dev->bdev;
-	struct request_queue *q = bdev_get_queue(bdev);
+	struct request_queue *q = bdev_get_queue(dev->bdev);
+	struct verify_rq_based_data *v = data;
 
-	/* request-based cannot stack on partitions! */
-	if (bdev != bdev->bd_contains)
-		return false;
+	if (queue_is_mq(q))
+		v->mq_count++;
+	else
+		v->sq_count++;
 
 	return queue_is_mq(q);
 }
@@ -945,6 +951,7 @@
 {
 	unsigned i;
 	unsigned bio_based = 0, request_based = 0, hybrid = 0;
+	struct verify_rq_based_data v = {.sq_count = 0, .mq_count = 0};
 	struct dm_target *tgt;
 	struct list_head *devices = dm_table_get_devices(t);
 	enum dm_queue_mode live_md_type = dm_get_md_type(t->md);
@@ -1037,10 +1044,14 @@
 
 	/* Non-request-stackable devices can't be used for request-based dm */
 	if (!tgt->type->iterate_devices ||
-	    !tgt->type->iterate_devices(tgt, device_is_rq_stackable, NULL)) {
+	    !tgt->type->iterate_devices(tgt, device_is_rq_based, &v)) {
 		DMERR("table load rejected: including non-request-stackable devices");
 		return -EINVAL;
 	}
+	if (v.sq_count > 0) {
+		DMERR("table load rejected: not all devices are blk-mq request-stackable");
+		return -EINVAL;
+	}
 
 	return 0;
 }