[PATCH 17/26] nvdimm-pmem: convert to blk_alloc_disk/blk_cleanup_disk

Christoph Hellwig
2021-05-21T05:52:51Z

Convert the nvdimm-pmem driver to use the blk_alloc_disk and
blk_cleanup_disk helpers to simplify gendisk and request_queue
allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/nvdimm/pmem.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 968b8483c763..9fcd05084564 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -338,7 +338,7 @@ static void pmem_pagemap_cleanup(struct dev_pagemap *pgmap)
struct request_queue *q =
container_of(pgmap->ref, struct request_queue, q_usage_counter);

- blk_cleanup_queue(q);
+ blk_cleanup_disk(queue_to_disk(q));
}

static void pmem_release_queue(void *pgmap)
@@ -361,7 +361,6 @@ static void pmem_release_disk(void *__pmem)
kill_dax(pmem->dax_dev);
put_dax(pmem->dax_dev);
del_gendisk(pmem->disk);
- put_disk(pmem->disk);
}

static const struct dev_pagemap_ops fsdax_pagemap_ops = {
@@ -422,10 +421,12 @@ static int pmem_attach_disk(struct device *dev,
return -EBUSY;
}

- q = blk_alloc_queue(dev_to_node(dev));
- if (!q)
+ disk = blk_alloc_disk(nid);
+ if (!disk)
return -ENOMEM;
+ q = disk->queue;

+ pmem->disk = disk;
pmem->pfn_flags = PFN_DEV;
pmem->pgmap.ref = &q->q_usage_counter;
if (is_nd_pfn(dev)) {
@@ -470,11 +471,6 @@ static int pmem_attach_disk(struct device *dev,
if (pmem->pfn_flags & PFN_MAP)
blk_queue_flag_set(QUEUE_FLAG_DAX, q);

- disk = alloc_disk_node(0, nid);
- if (!disk)
- return -ENOMEM;
- pmem->disk = disk;
-
disk->fops = &pmem_fops;
disk->queue = q;
disk->private_data = pmem;
@@ -490,7 +486,6 @@ static int pmem_attach_disk(struct device *dev,
flags = DAXDEV_F_SYNC;
dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops, flags);
if (IS_ERR(dax_dev)) {
- put_disk(disk);
return PTR_ERR(dax_dev);
}
dax_write_cache(dax_dev, nvdimm_has_cache(nd_region));
--
2.30.2