diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/core.c | 76 | ||||
| -rw-r--r-- | drivers/nvme/host/nvme.h | 3 |
2 files changed, 18 insertions, 61 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 3a97daa163f6..a56a1e0432e7 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -52,9 +52,6 @@ static u8 nvme_max_retries = 5; module_param_named(max_retries, nvme_max_retries, byte, 0644); MODULE_PARM_DESC(max_retries, "max number of retries a command may have"); -static int nvme_char_major; -module_param(nvme_char_major, int, 0); - static unsigned long default_ps_max_latency_us = 100000; module_param(default_ps_max_latency_us, ulong, 0644); MODULE_PARM_DESC(default_ps_max_latency_us, @@ -71,11 +68,8 @@ MODULE_PARM_DESC(streams, "turn on support for Streams write directives"); struct workqueue_struct *nvme_wq; EXPORT_SYMBOL_GPL(nvme_wq); -static LIST_HEAD(nvme_ctrl_list); -static DEFINE_SPINLOCK(dev_list_lock); - static DEFINE_IDA(nvme_instance_ida); - +static dev_t nvme_chr_devt; static struct class *nvme_class; static __le32 nvme_get_log_dw10(u8 lid, size_t size) @@ -1031,20 +1025,12 @@ static int nvme_open(struct block_device *bdev, fmode_t mode) if (!kref_get_unless_zero(&ns->kref)) return -ENXIO; - if (!try_module_get(ns->ctrl->ops->module)) { - kref_put(&ns->kref, nvme_free_ns); - return -ENXIO; - } - return 0; } static void nvme_release(struct gendisk *disk, fmode_t mode) { - struct nvme_ns *ns = disk->private_data; - - module_put(ns->ctrl->ops->module); - nvme_put_ns(ns); + nvme_put_ns(disk->private_data); } static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) @@ -1902,33 +1888,12 @@ EXPORT_SYMBOL_GPL(nvme_init_identify); static int nvme_dev_open(struct inode *inode, struct file *file) { - struct nvme_ctrl *ctrl; - int instance = iminor(inode); - int ret = -ENODEV; - - spin_lock(&dev_list_lock); - list_for_each_entry(ctrl, &nvme_ctrl_list, node) { - if (ctrl->instance != instance) - continue; - - if (!ctrl->admin_q) { - ret = -EWOULDBLOCK; - break; - } - if (!kobject_get_unless_zero(&ctrl->device->kobj)) - break; - file->private_data = ctrl; - ret = 0; - break; - } - spin_unlock(&dev_list_lock); - - return ret; -} + struct nvme_ctrl *ctrl = + container_of(inode->i_cdev, struct nvme_ctrl, cdev); -static int nvme_dev_release(struct inode *inode, struct file *file) -{ - nvme_put_ctrl(file->private_data); + if (!ctrl->admin_q) + return -EWOULDBLOCK; + file->private_data = ctrl; return 0; } @@ -1992,7 +1957,6 @@ static long nvme_dev_ioctl(struct file *file, unsigned int cmd, static const struct file_operations nvme_dev_fops = { .owner = THIS_MODULE, .open = nvme_dev_open, - .release = nvme_dev_release, .unlocked_ioctl = nvme_dev_ioctl, .compat_ioctl = nvme_dev_ioctl, }; @@ -2703,11 +2667,7 @@ EXPORT_SYMBOL_GPL(nvme_start_ctrl); void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) { - device_del(ctrl->device); - - spin_lock(&dev_list_lock); - list_del(&ctrl->node); - spin_unlock(&dev_list_lock); + cdev_device_del(&ctrl->cdev, ctrl->device); } EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); @@ -2750,7 +2710,7 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, device_initialize(&ctrl->ctrl_device); ctrl->device = &ctrl->ctrl_device; - ctrl->device->devt = MKDEV(nvme_char_major, ctrl->instance); + ctrl->device->devt = MKDEV(MAJOR(nvme_chr_devt), ctrl->instance); ctrl->device->class = nvme_class; ctrl->device->parent = ctrl->dev; ctrl->device->groups = nvme_dev_attr_groups; @@ -2759,16 +2719,15 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, ret = dev_set_name(ctrl->device, "nvme%d", ctrl->instance); if (ret) goto out_release_instance; - ret = device_add(ctrl->device); + + cdev_init(&ctrl->cdev, &nvme_dev_fops); + ctrl->cdev.owner = ops->module; + ret = cdev_device_add(&ctrl->cdev, ctrl->device); if (ret) goto out_free_name; ida_init(&ctrl->ns_ida); - spin_lock(&dev_list_lock); - list_add_tail(&ctrl->node, &nvme_ctrl_list); - spin_unlock(&dev_list_lock); - /* * Initialize latency tolerance controls. The sysfs files won't * be visible to userspace unless the device actually supports APST. @@ -2909,12 +2868,9 @@ int __init nvme_core_init(void) if (!nvme_wq) return -ENOMEM; - result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", - &nvme_dev_fops); + result = alloc_chrdev_region(&nvme_chr_devt, 0, NVME_MINORS, "nvme"); if (result < 0) goto destroy_wq; - else if (result > 0) - nvme_char_major = result; nvme_class = class_create(THIS_MODULE, "nvme"); if (IS_ERR(nvme_class)) { @@ -2925,7 +2881,7 @@ int __init nvme_core_init(void) return 0; unregister_chrdev: - __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); + unregister_chrdev_region(nvme_chr_devt, NVME_MINORS); destroy_wq: destroy_workqueue(nvme_wq); return result; @@ -2934,7 +2890,7 @@ destroy_wq: void nvme_core_exit(void) { class_destroy(nvme_class); - __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); + unregister_chrdev_region(nvme_chr_devt, NVME_MINORS); destroy_workqueue(nvme_wq); } diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index ae60d8342e60..1bb2bc165e54 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -15,6 +15,7 @@ #define _NVME_H #include <linux/nvme.h> +#include <linux/cdev.h> #include <linux/pci.h> #include <linux/kref.h> #include <linux/blk-mq.h> @@ -134,7 +135,7 @@ struct nvme_ctrl { struct mutex namespaces_mutex; struct device ctrl_device; struct device *device; /* char device */ - struct list_head node; + struct cdev cdev; struct ida ns_ida; struct work_struct reset_work; |