block: call blk_integrity_add earlier in device_add_disk

Doing all the sysfs file creation before adding the bdev and thus
allowing it to be opened will simplify the about to be added error
handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20210818144542.19305-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/genhd.c

@@ -492,6 +492,8 @@ void device_add_disk(struct device *parent, struct gendisk *disk,
 	 */
 	pm_runtime_set_memalloc_noio(ddev, true);
 
+	blk_integrity_add(disk);
+
 	disk->part0->bd_holder_dir =
 		kobject_create_and_add("holders", &ddev->kobj);
 	disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
@@ -538,7 +540,6 @@ void device_add_disk(struct device *parent, struct gendisk *disk,
 	blk_register_queue(disk);
 
 	disk_add_events(disk);
-	blk_integrity_add(disk);
 }
 EXPORT_SYMBOL(device_add_disk);