From: Christoph Hellwig hch@lst.de
mainline inclusion from mainline-v5.14-rc1 commit 77567b25ab9f06c6477a153e58ace6897c6794d1 category: bugfix bugzilla: 188733
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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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 Reviewed-by: Chaitanya Kulkarni chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210602065345.355274-27-hch@lst.de Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Zhong Jinghua zhongjinghua@huawei.com Signed-off-by: Li Nan linan122@huawei.com --- drivers/mtd/ubi/block.c | 68 ++++++++++++++++++----------------------- 1 file changed, 29 insertions(+), 39 deletions(-)
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c index e1a2ae21dfd3..e003b4b44ffa 100644 --- a/drivers/mtd/ubi/block.c +++ b/drivers/mtd/ubi/block.c @@ -394,53 +394,46 @@ int ubiblock_create(struct ubi_volume_info *vi) dev->vol_id = vi->vol_id; dev->leb_size = vi->usable_leb_size;
+ dev->tag_set.ops = &ubiblock_mq_ops; + dev->tag_set.queue_depth = 64; + dev->tag_set.numa_node = NUMA_NO_NODE; + dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; + dev->tag_set.cmd_size = sizeof(struct ubiblock_pdu); + dev->tag_set.driver_data = dev; + dev->tag_set.nr_hw_queues = 1; + + ret = blk_mq_alloc_tag_set(&dev->tag_set); + if (ret) { + dev_err(disk_to_dev(dev->gd), "blk_mq_alloc_tag_set failed"); + goto out_free_dev;; + } + + /* Initialize the gendisk of this ubiblock device */ - gd = alloc_disk(1); - if (!gd) { - pr_err("UBI: block: alloc_disk failed\n"); - ret = -ENODEV; - goto out_free_dev; + gd = blk_mq_alloc_disk(&dev->tag_set, dev); + if (IS_ERR(gd)) { + ret = PTR_ERR(gd); + goto out_free_tags; }
gd->fops = &ubiblock_ops; gd->major = ubiblock_major; + gd->minors = 1; gd->first_minor = idr_alloc(&ubiblock_minor_idr, dev, 0, 0, GFP_KERNEL); if (gd->first_minor < 0) { dev_err(disk_to_dev(gd), "block: dynamic minor allocation failed"); ret = -ENODEV; - goto out_put_disk; + goto out_cleanup_disk; } gd->private_data = dev; sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id); set_capacity(gd, disk_capacity); dev->gd = gd;
- dev->tag_set.ops = &ubiblock_mq_ops; - dev->tag_set.queue_depth = 64; - dev->tag_set.numa_node = NUMA_NO_NODE; - dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; - dev->tag_set.cmd_size = sizeof(struct ubiblock_pdu); - dev->tag_set.driver_data = dev; - dev->tag_set.nr_hw_queues = 1; - - ret = blk_mq_alloc_tag_set(&dev->tag_set); - if (ret) { - dev_err(disk_to_dev(dev->gd), "blk_mq_alloc_tag_set failed"); - goto out_remove_minor; - } - - dev->rq = blk_mq_init_queue(&dev->tag_set); - if (IS_ERR(dev->rq)) { - dev_err(disk_to_dev(gd), "blk_mq_init_queue failed"); - ret = PTR_ERR(dev->rq); - goto out_free_tags; - } + dev->rq = gd->queue; blk_queue_max_segments(dev->rq, UBI_MAX_SG_COUNT);
- dev->rq->queuedata = dev; - dev->gd->queue = dev->rq; - /* * Create one workqueue per volume (per registered block device). * Rembember workqueues are cheap, they're not threads. @@ -448,7 +441,7 @@ int ubiblock_create(struct ubi_volume_info *vi) dev->wq = alloc_workqueue("%s", 0, 0, gd->disk_name); if (!dev->wq) { ret = -ENOMEM; - goto out_free_queue; + goto out_remove_minor; }
list_add_tail(&dev->list, &ubiblock_devices); @@ -460,14 +453,12 @@ int ubiblock_create(struct ubi_volume_info *vi) mutex_unlock(&devices_mutex); return 0;
-out_free_queue: - blk_cleanup_queue(dev->rq); -out_free_tags: - blk_mq_free_tag_set(&dev->tag_set); out_remove_minor: idr_remove(&ubiblock_minor_idr, gd->first_minor); -out_put_disk: - put_disk(dev->gd); +out_cleanup_disk: + blk_cleanup_disk(dev->gd); +out_free_tags: + blk_mq_free_tag_set(&dev->tag_set); out_free_dev: kfree(dev); out_unlock: @@ -483,11 +474,10 @@ static void ubiblock_cleanup(struct ubiblock *dev) /* Flush pending work */ destroy_workqueue(dev->wq); /* Finally destroy the blk queue */ - blk_cleanup_queue(dev->rq); - blk_mq_free_tag_set(&dev->tag_set); dev_info(disk_to_dev(dev->gd), "released"); + blk_cleanup_disk(dev->gd); + blk_mq_free_tag_set(&dev->tag_set); idr_remove(&ubiblock_minor_idr, dev->gd->first_minor); - put_disk(dev->gd); }
int ubiblock_remove(struct ubi_volume_info *vi)