[PATCH 21/30] pd: use blk_mq_alloc_disk and blk_cleanup_disk

Christoph Hellwig
2021-06-02T07:32:30Z

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/paride/pd.c | 30 ++++++++++++------------------
1 file changed, 12 insertions(+), 18 deletions(-)

diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index 828a45ffe0e7..3b2b8e872beb 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -879,18 +879,6 @@ static void pd_probe_drive(struct pd_unit *disk)
{
struct gendisk *p;

- p = alloc_disk(1 << PD_BITS);
- if (!p)
- return;
-
- strcpy(p->disk_name, disk->name);
- p->fops = &pd_fops;
- p->major = major;
- p->first_minor = (disk - pd) << PD_BITS;
- p->events = DISK_EVENT_MEDIA_CHANGE;
- disk->gd = p;
- p->private_data = disk;
-
memset(&disk->tag_set, 0, sizeof(disk->tag_set));
disk->tag_set.ops = &pd_mq_ops;
disk->tag_set.cmd_size = sizeof(struct pd_req);
@@ -903,14 +891,21 @@ static void pd_probe_drive(struct pd_unit *disk)
if (blk_mq_alloc_tag_set(&disk->tag_set))
return;

- p->queue = blk_mq_init_queue(&disk->tag_set);
- if (IS_ERR(p->queue)) {
+ p = blk_mq_alloc_disk(&disk->tag_set, disk);
+ if (!p) {
blk_mq_free_tag_set(&disk->tag_set);
- p->queue = NULL;
return;
}
+ disk->gd = p;
+
+ strcpy(p->disk_name, disk->name);
+ p->fops = &pd_fops;
+ p->major = major;
+ p->first_minor = (disk - pd) << PD_BITS;
+ p->minors = 1 << PD_BITS;
+ p->events = DISK_EVENT_MEDIA_CHANGE;
+ p->private_data = disk;

- p->queue->queuedata = disk;
blk_queue_max_hw_sectors(p->queue, cluster);
blk_queue_bounce_limit(p->queue, BLK_BOUNCE_HIGH);

@@ -1019,9 +1014,8 @@ static void __exit pd_exit(void)
if (p) {
disk->gd = NULL;
del_gendisk(p);
- blk_cleanup_queue(p->queue);
blk_mq_free_tag_set(&disk->tag_set);
- put_disk(p);
+ blk_cleanup_disk(p);
pi_release(disk->pi);