[PATCH 29/30] ataflop: use blk_mq_alloc_disk and blk_cleanup_disk

Christoph Hellwig
2021-06-02T07:48:08Z

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/ataflop.c | 16 ++++------------
1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index d601e49f80e0..a093644ac39f 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -1968,22 +1968,14 @@ static const struct blk_mq_ops ataflop_mq_ops = {
static int ataflop_alloc_disk(unsigned int drive, unsigned int type)
{
struct gendisk *disk;
- int ret;
-
- disk = alloc_disk(1);
- if (!disk)
- return -ENOMEM;

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

disk->major = FLOPPY_MAJOR;
disk->first_minor = drive + (type << 2);
+ disk->minors = 1;
sprintf(disk->disk_name, "fd%d", drive);
disk->fops = &floppy_fops;
disk->events = DISK_EVENT_MEDIA_CHANGE;