nullblk: Fix cleanup order in null_add_dev() error path

In null_add_dev(), if an error happen after initializing the resources
for a zoned null block device, we must free these resources before
exiting the function. To ensure this, move the out_cleanup_zone label
after out_cleanup_disk as we jump to this latter label if an error
happens after calling null_init_zoned_dev().

Fixes: e440626 ("null_blk: pass queue_limits to blk_mq_alloc_disk")
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240330005300.1503252-1-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: damien-lemoal

drivers/block/null_blk/main.c

@@ -1965,10 +1965,10 @@ static int null_add_dev(struct nullb_device *dev)
 
 out_ida_free:
 	ida_free(&nullb_indexes, nullb->index);
-out_cleanup_zone:
-	null_free_zoned_dev(dev);
 out_cleanup_disk:
 	put_disk(nullb->disk);
+out_cleanup_zone:
+	null_free_zoned_dev(dev);
 out_cleanup_tags:
 	if (nullb->tag_set == &nullb->__tag_set)
 		blk_mq_free_tag_set(nullb->tag_set);