pktcdvd: convert to blk_alloc_disk/blk_cleanup_disk

Convert the pktcdvd driver to use the blk_alloc_disk and blk_cleanup_disk
helpers to simplify gendisk and request_queue allocation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-9-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/pktcdvd.c

@@ -2711,19 +2711,17 @@ static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev)
 	pd->write_congestion_off = write_congestion_off;
 
 	ret = -ENOMEM;
-	disk = alloc_disk(1);
+	disk = blk_alloc_disk(NUMA_NO_NODE);
 	if (!disk)
 		goto out_mem;
 	pd->disk = disk;
 	disk->major = pktdev_major;
 	disk->first_minor = idx;
+	disk->minors = 1;
 	disk->fops = &pktcdvd_ops;
 	disk->flags = GENHD_FL_REMOVABLE;
 	strcpy(disk->disk_name, pd->name);
 	disk->private_data = pd;
-	disk->queue = blk_alloc_queue(NUMA_NO_NODE);
-	if (!disk->queue)
-		goto out_mem2;
 
 	pd->pkt_dev = MKDEV(pktdev_major, idx);
 	ret = pkt_new_dev(pd, dev);
@@ -2746,7 +2744,7 @@ static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev)
 	return 0;
 
 out_mem2:
-	put_disk(disk);
+	blk_cleanup_disk(disk);
 out_mem:
 	mempool_exit(&pd->rb_pool);
 	kfree(pd);
@@ -2796,8 +2794,7 @@ static int pkt_remove_dev(dev_t pkt_dev)
 	pkt_dbg(1, pd, "writer unmapped\n");
 
 	del_gendisk(pd->disk);
-	blk_cleanup_queue(pd->disk->queue);
-	put_disk(pd->disk);
+	blk_cleanup_disk(pd->disk);
 
 	mempool_exit(&pd->rb_pool);
 	kfree(pd);