[PATCH 17/30] floppy: use blk_mq_alloc_disk and blk_cleanup_disk

Christoph Hellwig
2021-06-02T06:55:48Z

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

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/floppy.c | 20 +++++---------------
1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 8a9d22207c59..cbed9776f285 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4491,23 +4491,15 @@ static bool floppy_available(int drive)
static int floppy_alloc_disk(unsigned int drive, unsigned int type)
{
struct gendisk *disk;
- int err;
-
- disk = alloc_disk(1);
- if (!disk)
- return -ENOMEM;

- disk->queue = blk_mq_init_queue(&tag_sets[drive]);
- if (IS_ERR(disk->queue)) {
- err = PTR_ERR(disk->queue);
- disk->queue = NULL;
- put_disk(disk);
- return err;
- }
+ disk = blk_mq_alloc_disk(&tag_sets[drive], NULL);
+ if (IS_ERR(disk))
+ return PTR_ERR(disk);

blk_queue_max_hw_sectors(disk->queue, 64);
disk->major = FLOPPY_MAJOR;
disk->first_minor = TOMINOR(drive) | (type << 2);
+ disk->minors = 1;
disk->fops = &floppy_fops;
disk->events = DISK_EVENT_MEDIA_CHANGE;
if (type)
@@ -4727,10 +4719,8 @@ static int __init do_floppy_init(void)
if (!disks[drive][0])
break;
del_timer_sync(&motor_off_timer[drive]);
- blk_cleanup_queue(disks[drive][0]->queue);
- disks[drive][0]->queue = NULL;
+ blk_cleanup_disk(disks[drive][0]);
blk_mq_free_tag_set(&tag_sets[drive]);
- put_disk(disks[drive][0]);
}
return err;
}
--
2.30.2