[PATCH 11/30] swim3: use blk_mq_alloc_disk

Christoph Hellwig
2021-06-02T07:13:37Z

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

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/swim3.c | 33 ++++++++++++++-------------------
1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index a515d0c1d2cb..965af0a3e95b 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -1202,30 +1202,27 @@ static int swim3_attach(struct macio_dev *mdev,
return rc;
}

- disk = alloc_disk(1);
- if (disk == NULL) {
- rc = -ENOMEM;
- goto out_unregister;
- }
-
fs = &floppy_states[floppy_count];
memset(fs, 0, sizeof(*fs));

- disk->queue = blk_mq_init_sq_queue(&fs->tag_set, &swim3_mq_ops, 2,
- BLK_MQ_F_SHOULD_MERGE);
- if (IS_ERR(disk->queue)) {
- rc = PTR_ERR(disk->queue);
- disk->queue = NULL;
- goto out_put_disk;
+ rc = blk_mq_alloc_sq_tag_set(&fs->tag_set, &swim3_mq_ops, 2,
+ BLK_MQ_F_SHOULD_MERGE);
+ if (rc)
+ goto out_unregister;
+
+ disk = blk_mq_alloc_disk(&fs->tag_set, fs);
+ if (IS_ERR(disk)) {
+ rc = PTR_ERR(disk);
+ goto out_free_tag_set;
}
- disk->queue->queuedata = fs;

rc = swim3_add_device(mdev, floppy_count);
if (rc)
- goto out_cleanup_queue;
+ goto out_cleanup_disk;

disk->major = FLOPPY_MAJOR;
disk->first_minor = floppy_count;
+ disk->minors = 1;
disk->fops = &floppy_fops;
disk->private_data = fs;
disk->events = DISK_EVENT_MEDIA_CHANGE;
@@ -1237,12 +1234,10 @@ static int swim3_attach(struct macio_dev *mdev,
disks[floppy_count++] = disk;
return 0;

-out_cleanup_queue:
- blk_cleanup_queue(disk->queue);
- disk->queue = NULL;
+out_cleanup_disk:
+ blk_cleanup_disk(disk);
+out_free_tag_set:
blk_mq_free_tag_set(&fs->tag_set);
-out_put_disk:
- put_disk(disk);
out_unregister:
if (floppy_count == 0)
unregister_blkdev(FLOPPY_MAJOR, "fd");