[PATCH 12/30] swim: use blk_mq_alloc_disk

Christoph Hellwig
2021-06-02T06:55:31Z

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/swim.c | 34 ++++++++++++++--------------------
1 file changed, 14 insertions(+), 20 deletions(-)

diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 2917b21f48ff..7ccc8d2a41bc 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -800,23 +800,20 @@ static int swim_floppy_init(struct swim_priv *swd)
spin_lock_init(&swd->lock);

for (drive = 0; drive < swd->floppy_count; drive++) {
- struct request_queue *q;
-
- swd->unit[drive].disk = alloc_disk(1);
- if (swd->unit[drive].disk == NULL) {
- err = -ENOMEM;
+ err = blk_mq_alloc_sq_tag_set(&swd->unit[drive].tag_set,
+ &swim_mq_ops, 2, BLK_MQ_F_SHOULD_MERGE);
+ if (err)
goto exit_put_disks;
- }

- q = blk_mq_init_sq_queue(&swd->unit[drive].tag_set, &swim_mq_ops,
- 2, BLK_MQ_F_SHOULD_MERGE);
- if (IS_ERR(q)) {
- err = PTR_ERR(q);
+ swd->unit[drive].disk =
+ blk_mq_alloc_disk(&swd->unit[drive].tag_set,
+ &swd->unit[drive]);
+ if (IS_ERR(swd->unit[drive].disk)) {
+ blk_mq_free_tag_set(&swd->unit[drive].tag_set);
+ err = PTR_ERR(swd->unit[drive].disk);
goto exit_put_disks;
}

- swd->unit[drive].disk->queue = q;
- swd->unit[drive].disk->queue->queuedata = &swd->unit[drive];
swd->unit[drive].swd = swd;
}

@@ -824,6 +821,7 @@ static int swim_floppy_init(struct swim_priv *swd)
swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE;
swd->unit[drive].disk->major = FLOPPY_MAJOR;
swd->unit[drive].disk->first_minor = drive;
+ swd->unit[drive].disk->minors = 1;
sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive);
swd->unit[drive].disk->fops = &floppy_fops;
swd->unit[drive].disk->events = DISK_EVENT_MEDIA_CHANGE;
@@ -839,14 +837,10 @@ static int swim_floppy_init(struct swim_priv *swd)
do {
struct gendisk *disk = swd->unit[drive].disk;

- if (disk) {
- if (disk->queue) {
- blk_cleanup_queue(disk->queue);
- disk->queue = NULL;
- }
- blk_mq_free_tag_set(&swd->unit[drive].tag_set);
- put_disk(disk);
- }
+ if (!disk)
+ continue;
+ blk_cleanup_disk(disk);
+ blk_mq_free_tag_set(&swd->unit[drive].tag_set);
} while (drive--);
return err;
}
--
2.30.2