[PATCH 24/30] sx8: use blk_mq_alloc_disk and blk_cleanup_disk

Christoph Hellwig
2021-06-02T06:56:29Z

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/sx8.c | 23 +++++++----------------
1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/drivers/block/sx8.c b/drivers/block/sx8.c
index 2cdf2771f8e8..f01f860b0e62 100644
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@@ -1343,32 +1343,25 @@ static int carm_init_disk(struct carm_host *host, unsigned int port_no)
{
struct carm_port *port = &host->port[port_no];
struct gendisk *disk;
- struct request_queue *q;

port->host = host;
port->port_no = port_no;

- disk = alloc_disk(CARM_MINORS_PER_MAJOR);
- if (!disk)
- return -ENOMEM;
+ disk = blk_mq_alloc_disk(&host->tag_set, port);
+ if (IS_ERR(disk))
+ return PTR_ERR(disk);

port->disk = disk;
sprintf(disk->disk_name, DRV_NAME "/%u",
(unsigned int)host->id * CARM_MAX_PORTS + port_no);
disk->major = host->major;
disk->first_minor = port_no * CARM_MINORS_PER_MAJOR;
+ disk->minors = CARM_MINORS_PER_MAJOR;
disk->fops = &carm_bd_ops;
disk->private_data = port;

- q = blk_mq_init_queue(&host->tag_set);
- if (IS_ERR(q))
- return PTR_ERR(q);
-
- blk_queue_max_segments(q, CARM_MAX_REQ_SG);
- blk_queue_segment_boundary(q, CARM_SG_BOUNDARY);
-
- q->queuedata = port;
- disk->queue = q;
+ blk_queue_max_segments(disk->queue, CARM_MAX_REQ_SG);
+ blk_queue_segment_boundary(disk->queue, CARM_SG_BOUNDARY);
return 0;
}

@@ -1382,9 +1375,7 @@ static void carm_free_disk(struct carm_host *host, unsigned int port_no)

if (disk->flags & GENHD_FL_UP)
del_gendisk(disk);
- if (disk->queue)
- blk_cleanup_queue(disk->queue);
- put_disk(disk);
+ blk_cleanup_disk(disk);
}

static int carm_init_shm(struct carm_host *host)
--
2.30.2