[PATCH 08/30] mspro: use blk_mq_alloc_disk

Christoph Hellwig
2021-06-02T06:54:58Z

Use the blk_mq_alloc_disk API to simplify the gendisk and request_queue
allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/memstick/core/mspro_block.c | 26 +++++++++++---------------
1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index cf7fe0d58ee7..22778d0e24f5 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -1205,21 +1205,17 @@ static int mspro_block_init_disk(struct memstick_dev *card)
if (disk_id < 0)
return disk_id;

- msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
- if (!msb->disk) {
- rc = -ENOMEM;
+ rc = blk_mq_alloc_sq_tag_set(&msb->tag_set, &mspro_mq_ops, 2,
+ BLK_MQ_F_SHOULD_MERGE);
+ if (rc)
goto out_release_id;
- }

- msb->queue = blk_mq_init_sq_queue(&msb->tag_set, &mspro_mq_ops, 2,
- BLK_MQ_F_SHOULD_MERGE);
- if (IS_ERR(msb->queue)) {
- rc = PTR_ERR(msb->queue);
- msb->queue = NULL;
- goto out_put_disk;
+ msb->disk = blk_mq_alloc_disk(&msb->tag_set, card);
+ if (IS_ERR(msb->disk)) {
+ rc = PTR_ERR(msb->disk);
+ goto out_free_tag_set;
}
-
- msb->queue->queuedata = card;
+ msb->queue = msb->disk->queue;

blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
@@ -1228,10 +1224,10 @@ static int mspro_block_init_disk(struct memstick_dev *card)

msb->disk->major = major;
msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
+ msb->disk->minors = 1 << MSPRO_BLOCK_PART_SHIFT;
msb->disk->fops = &ms_block_bdops;
msb->usage_count = 1;
msb->disk->private_data = msb;
- msb->disk->queue = msb->queue;

sprintf(msb->disk->disk_name, "mspblk%d", disk_id);

@@ -1247,8 +1243,8 @@ static int mspro_block_init_disk(struct memstick_dev *card)
msb->active = 1;
return 0;

-out_put_disk:
- put_disk(msb->disk);
+out_free_tag_set:
+ blk_mq_free_tag_set(&msb->tag_set);
out_release_id:
mutex_lock(&mspro_block_disk_lock);
idr_remove(&mspro_block_disk_idr, disk_id);
--
2.30.2