rsxx: convert to blk_alloc_disk/blk_cleanup_disk

Convert the rsxx 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: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-10-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/rsxx/dev.c

@@ -236,47 +236,40 @@ int rsxx_setup_dev(struct rsxx_cardinfo *card)
 		return -ENOMEM;
 	}
 
-	card->queue = blk_alloc_queue(NUMA_NO_NODE);
-	if (!card->queue) {
-		dev_err(CARD_TO_DEV(card), "Failed queue alloc\n");
-		unregister_blkdev(card->major, DRIVER_NAME);
-		return -ENOMEM;
-	}
-
-	card->gendisk = alloc_disk(blkdev_minors);
+	card->gendisk = blk_alloc_disk(blkdev_minors);
 	if (!card->gendisk) {
 		dev_err(CARD_TO_DEV(card), "Failed disk alloc\n");
-		blk_cleanup_queue(card->queue);
 		unregister_blkdev(card->major, DRIVER_NAME);
 		return -ENOMEM;
 	}
 
 	if (card->config_valid) {
 		blk_size = card->config.data.block_size;
-		blk_queue_dma_alignment(card->queue, blk_size - 1);
-		blk_queue_logical_block_size(card->queue, blk_size);
+		blk_queue_dma_alignment(card->gendisk->queue, blk_size - 1);
+		blk_queue_logical_block_size(card->gendisk->queue, blk_size);
 	}
 
-	blk_queue_max_hw_sectors(card->queue, blkdev_max_hw_sectors);
-	blk_queue_physical_block_size(card->queue, RSXX_HW_BLK_SIZE);
+	blk_queue_max_hw_sectors(card->gendisk->queue, blkdev_max_hw_sectors);
+	blk_queue_physical_block_size(card->gendisk->queue, RSXX_HW_BLK_SIZE);
 
-	blk_queue_flag_set(QUEUE_FLAG_NONROT, card->queue);
-	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, card->queue);
+	blk_queue_flag_set(QUEUE_FLAG_NONROT, card->gendisk->queue);
+	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, card->gendisk->queue);
 	if (rsxx_discard_supported(card)) {
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, card->queue);
-		blk_queue_max_discard_sectors(card->queue,
+		blk_queue_flag_set(QUEUE_FLAG_DISCARD, card->gendisk->queue);
+		blk_queue_max_discard_sectors(card->gendisk->queue,
 						RSXX_HW_BLK_SIZE >> 9);
-		card->queue->limits.discard_granularity = RSXX_HW_BLK_SIZE;
-		card->queue->limits.discard_alignment   = RSXX_HW_BLK_SIZE;
+		card->gendisk->queue->limits.discard_granularity =
+			RSXX_HW_BLK_SIZE;
+		card->gendisk->queue->limits.discard_alignment =
+			RSXX_HW_BLK_SIZE;
 	}
 
 	snprintf(card->gendisk->disk_name, sizeof(card->gendisk->disk_name),
 		 "rsxx%d", card->disk_id);
 	card->gendisk->major = card->major;
-	card->gendisk->first_minor = 0;
+	card->gendisk->minors = blkdev_minors;
 	card->gendisk->fops = &rsxx_fops;
 	card->gendisk->private_data = card;
-	card->gendisk->queue = card->queue;
 
 	return 0;
 }
@@ -286,10 +279,8 @@ void rsxx_destroy_dev(struct rsxx_cardinfo *card)
 	if (!enable_blkdev)
 		return;
 
-	put_disk(card->gendisk);
+	blk_cleanup_disk(card->gendisk);
 	card->gendisk = NULL;
-
-	blk_cleanup_queue(card->queue);
 	unregister_blkdev(card->major, DRIVER_NAME);
 }
 

drivers/block/rsxx/rsxx_priv.h

@@ -154,7 +154,6 @@ struct rsxx_cardinfo {
 	bool			bdev_attached;
 	int			disk_id;
 	int			major;
-	struct request_queue	*queue;
 	struct gendisk		*gendisk;
 	struct {
 		/* Used to convert a byte address to a device address. */