[PATCH 23/30] rnbd: use blk_mq_alloc_disk and blk_cleanup_disk

Christoph Hellwig
2021-06-02T06:56:17Z

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/rnbd/rnbd-clt.c | 35 ++++++++---------------------------
1 file changed, 8 insertions(+), 27 deletions(-)

diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index c604a402cd5c..f4fa45d24c0b 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -1353,18 +1353,6 @@ static void rnbd_init_mq_hw_queues(struct rnbd_clt_dev *dev)
}
}

-static int setup_mq_dev(struct rnbd_clt_dev *dev)
-{
- dev->queue = blk_mq_init_queue(&dev->sess->tag_set);
- if (IS_ERR(dev->queue)) {
- rnbd_clt_err(dev, "Initializing multiqueue queue failed, err: %ld\n",
- PTR_ERR(dev->queue));
- return PTR_ERR(dev->queue);
- }
- rnbd_init_mq_hw_queues(dev);
- return 0;
-}
-
static void setup_request_queue(struct rnbd_clt_dev *dev)
{
blk_queue_logical_block_size(dev->queue, dev->logical_block_size);
@@ -1393,13 +1381,13 @@ static void setup_request_queue(struct rnbd_clt_dev *dev)
blk_queue_io_opt(dev->queue, dev->sess->max_io_size);
blk_queue_virt_boundary(dev->queue, SZ_4K - 1);
blk_queue_write_cache(dev->queue, dev->wc, dev->fua);
- dev->queue->queuedata = dev;
}

static void rnbd_clt_setup_gen_disk(struct rnbd_clt_dev *dev, int idx)
{
dev->gd->major = rnbd_client_major;
dev->gd->first_minor = idx << RNBD_PART_BITS;
+ dev->gd->minors = 1 << RNBD_PART_BITS;
dev->gd->fops = &rnbd_client_ops;
dev->gd->queue = dev->queue;
dev->gd->private_data = dev;
@@ -1426,24 +1414,18 @@ static void rnbd_clt_setup_gen_disk(struct rnbd_clt_dev *dev, int idx)

static int rnbd_client_setup_device(struct rnbd_clt_dev *dev)
{
- int err, idx = dev->clt_device_id;
+ int idx = dev->clt_device_id;

dev->size = dev->nsectors * dev->logical_block_size;

- err = setup_mq_dev(dev);
- if (err)
- return err;
+ dev->gd = blk_mq_alloc_disk(&dev->sess->tag_set, dev);
+ if (IS_ERR(dev->gd))
+ return PTR_ERR(dev->gd);
+ dev->queue = dev->gd->queue;
+ rnbd_init_mq_hw_queues(dev);

setup_request_queue(dev);
-
- dev->gd = alloc_disk_node(1 << RNBD_PART_BITS, NUMA_NO_NODE);
- if (!dev->gd) {
- blk_cleanup_queue(dev->queue);
- return -ENOMEM;
- }
-
rnbd_clt_setup_gen_disk(dev, idx);
-
return 0;
}

@@ -1650,8 +1632,7 @@ struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
static void destroy_gen_disk(struct rnbd_clt_dev *dev)
{
del_gendisk(dev->gd);
- blk_cleanup_queue(dev->queue);
- put_disk(dev->gd);
+ blk_cleanup_disk(dev->gd);
}

static void destroy_sysfs(struct rnbd_clt_dev *dev,
--
2.30.2