[PATCH 23/26] dcssblk: convert to blk_alloc_disk/blk_cleanup_disk

Christoph Hellwig
2021-05-21T05:53:02Z

Convert the dcssblk 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/s390/block/dcssblk.c | 26 ++++++++------------------
1 file changed, 8 insertions(+), 18 deletions(-)

diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index da33cb4cba28..7faa56399999 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -90,7 +90,6 @@ struct dcssblk_dev_info {
int segment_type;
unsigned char save_pending;
unsigned char is_shared;
- struct request_queue *dcssblk_queue;
int num_of_segments;
struct list_head seg_list;
struct dax_device *dax_dev;
@@ -429,9 +428,7 @@ dcssblk_shared_store(struct device *dev, struct device_attribute *attr, const ch
kill_dax(dev_info->dax_dev);
put_dax(dev_info->dax_dev);
del_gendisk(dev_info->gd);
- blk_cleanup_queue(dev_info->dcssblk_queue);
- dev_info->gd->queue = NULL;
- put_disk(dev_info->gd);
+ blk_cleanup_disk(dev_info->gd);
up_write(&dcssblk_devices_sem);

if (device_remove_file_self(dev, attr)) {
@@ -644,18 +641,17 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
dev_info->dev.release = dcssblk_release_segment;
dev_info->dev.groups = dcssblk_dev_attr_groups;
INIT_LIST_HEAD(&dev_info->lh);
- dev_info->gd = alloc_disk(DCSSBLK_MINORS_PER_DISK);
+ dev_info->gd = blk_alloc_disk(NUMA_NO_NODE);
if (dev_info->gd == NULL) {
rc = -ENOMEM;
goto seg_list_del;
}
dev_info->gd->major = dcssblk_major;
+ dev_info->gd->minors = DCSSBLK_MINORS_PER_DISK;
dev_info->gd->fops = &dcssblk_devops;
- dev_info->dcssblk_queue = blk_alloc_queue(NUMA_NO_NODE);
- dev_info->gd->queue = dev_info->dcssblk_queue;
dev_info->gd->private_data = dev_info;
- blk_queue_logical_block_size(dev_info->dcssblk_queue, 4096);
- blk_queue_flag_set(QUEUE_FLAG_DAX, dev_info->dcssblk_queue);
+ blk_queue_logical_block_size(dev_info->gd->queue, 4096);
+ blk_queue_flag_set(QUEUE_FLAG_DAX, dev_info->gd->queue);

seg_byte_size = (dev_info->end - dev_info->start + 1);
set_capacity(dev_info->gd, seg_byte_size >> 9); // size in sectors
@@ -719,9 +715,7 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char

put_dev:
list_del(&dev_info->lh);
- blk_cleanup_queue(dev_info->dcssblk_queue);
- dev_info->gd->queue = NULL;
- put_disk(dev_info->gd);
+ blk_cleanup_disk(dev_info->gd);
list_for_each_entry(seg_info, &dev_info->seg_list, lh) {
segment_unload(seg_info->segment_name);
}
@@ -731,9 +725,7 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
dev_list_del:
list_del(&dev_info->lh);
release_gd:
- blk_cleanup_queue(dev_info->dcssblk_queue);
- dev_info->gd->queue = NULL;
- put_disk(dev_info->gd);
+ blk_cleanup_disk(dev_info->gd);
up_write(&dcssblk_devices_sem);
seg_list_del:
if (dev_info == NULL)
@@ -801,9 +793,7 @@ dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const ch
kill_dax(dev_info->dax_dev);
put_dax(dev_info->dax_dev);
del_gendisk(dev_info->gd);
- blk_cleanup_queue(dev_info->dcssblk_queue);
- dev_info->gd->queue = NULL;
- put_disk(dev_info->gd);
+ blk_cleanup_disk(dev_info->gd);

/* unload all related segments */
list_for_each_entry(entry, &dev_info->seg_list, lh)
--
2.30.2