diff options
Diffstat (limited to 'drivers/watchdog/watchdog_dev.c')
| -rw-r--r-- | drivers/watchdog/watchdog_dev.c | 67 |
1 files changed, 30 insertions, 37 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 52e03f1c76e3..21c3ffdc8a09 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -38,7 +38,6 @@ #include <linux/init.h> /* For __init/__exit/... */ #include <linux/jiffies.h> /* For timeout functions */ #include <linux/kernel.h> /* For printk/panic/... */ -#include <linux/kref.h> /* For data references */ #include <linux/miscdevice.h> /* For handling misc devices */ #include <linux/module.h> /* For module stuff/... */ #include <linux/mutex.h> /* For mutexes */ @@ -53,14 +52,14 @@ /* * struct watchdog_core_data - watchdog core internal data - * @kref: Reference count. + * @dev: The watchdog's internal device * @cdev: The watchdog's Character device. * @wdd: Pointer to watchdog device. * @lock: Lock for watchdog core. * @status: Watchdog core internal status bits. */ struct watchdog_core_data { - struct kref kref; + struct device dev; struct cdev cdev; struct watchdog_device *wdd; struct mutex lock; @@ -802,7 +801,7 @@ static int watchdog_open(struct inode *inode, struct file *file) file->private_data = wd_data; if (!hw_running) - kref_get(&wd_data->kref); + get_device(&wd_data->dev); /* dev/watchdog is a virtual (and thus non-seekable) filesystem */ return nonseekable_open(inode, file); @@ -814,11 +813,11 @@ out_clear: return err; } -static void watchdog_core_data_release(struct kref *kref) +static void watchdog_core_data_release(struct device *dev) { struct watchdog_core_data *wd_data; - wd_data = container_of(kref, struct watchdog_core_data, kref); + wd_data = container_of(dev, struct watchdog_core_data, dev); kfree(wd_data); } @@ -878,7 +877,7 @@ done: */ if (!running) { module_put(wd_data->cdev.owner); - kref_put(&wd_data->kref, watchdog_core_data_release); + put_device(&wd_data->dev); } return 0; } @@ -897,17 +896,22 @@ static struct miscdevice watchdog_miscdev = { .fops = &watchdog_fops, }; +static struct class watchdog_class = { + .name = "watchdog", + .owner = THIS_MODULE, + .dev_groups = wdt_groups, +}; + /* * watchdog_cdev_register: register watchdog character device * @wdd: watchdog device - * @devno: character device number * * Register a watchdog character device including handling the legacy * /dev/watchdog node. /dev/watchdog is actually a miscdevice and * thus we set it up like that. */ -static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno) +static int watchdog_cdev_register(struct watchdog_device *wdd) { struct watchdog_core_data *wd_data; int err; @@ -915,7 +919,6 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno) wd_data = kzalloc(sizeof(struct watchdog_core_data), GFP_KERNEL); if (!wd_data) return -ENOMEM; - kref_init(&wd_data->kref); mutex_init(&wd_data->lock); wd_data->wdd = wdd; @@ -942,23 +945,33 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno) } } + device_initialize(&wd_data->dev); + wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id); + wd_data->dev.class = &watchdog_class; + wd_data->dev.parent = wdd->parent; + wd_data->dev.groups = wdd->groups; + wd_data->dev.release = watchdog_core_data_release; + dev_set_drvdata(&wd_data->dev, wdd); + dev_set_name(&wd_data->dev, "watchdog%d", wdd->id); + /* Fill in the data structures */ cdev_init(&wd_data->cdev, &watchdog_fops); - wd_data->cdev.owner = wdd->ops->owner; /* Add the device */ - err = cdev_add(&wd_data->cdev, devno, 1); + err = cdev_device_add(&wd_data->cdev, &wd_data->dev); if (err) { pr_err("watchdog%d unable to add device %d:%d\n", wdd->id, MAJOR(watchdog_devt), wdd->id); if (wdd->id == 0) { misc_deregister(&watchdog_miscdev); old_wd_data = NULL; - kref_put(&wd_data->kref, watchdog_core_data_release); + put_device(&wd_data->dev); } return err; } + wd_data->cdev.owner = wdd->ops->owner; + /* Record time of most recent heartbeat as 'just before now'. */ wd_data->last_hw_keepalive = jiffies - 1; @@ -968,7 +981,7 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno) */ if (watchdog_hw_running(wdd)) { __module_get(wdd->ops->owner); - kref_get(&wd_data->kref); + get_device(&wd_data->dev); if (handle_boot_enabled) queue_delayed_work(watchdog_wq, &wd_data->work, 0); else @@ -991,7 +1004,7 @@ static void watchdog_cdev_unregister(struct watchdog_device *wdd) { struct watchdog_core_data *wd_data = wdd->wd_data; - cdev_del(&wd_data->cdev); + cdev_device_del(&wd_data->cdev, &wd_data->dev); if (wdd->id == 0) { misc_deregister(&watchdog_miscdev); old_wd_data = NULL; @@ -1009,15 +1022,9 @@ static void watchdog_cdev_unregister(struct watchdog_device *wdd) cancel_delayed_work_sync(&wd_data->work); - kref_put(&wd_data->kref, watchdog_core_data_release); + put_device(&wd_data->dev); } -static struct class watchdog_class = { - .name = "watchdog", - .owner = THIS_MODULE, - .dev_groups = wdt_groups, -}; - /* * watchdog_dev_register: register a watchdog device * @wdd: watchdog device @@ -1029,27 +1036,14 @@ static struct class watchdog_class = { int watchdog_dev_register(struct watchdog_device *wdd) { - struct device *dev; - dev_t devno; int ret; - devno = MKDEV(MAJOR(watchdog_devt), wdd->id); - - ret = watchdog_cdev_register(wdd, devno); + ret = watchdog_cdev_register(wdd); if (ret) return ret; - dev = device_create_with_groups(&watchdog_class, wdd->parent, - devno, wdd, wdd->groups, - "watchdog%d", wdd->id); - if (IS_ERR(dev)) { - watchdog_cdev_unregister(wdd); - return PTR_ERR(dev); - } - ret = watchdog_register_pretimeout(wdd); if (ret) { - device_destroy(&watchdog_class, devno); watchdog_cdev_unregister(wdd); } @@ -1067,7 +1061,6 @@ int watchdog_dev_register(struct watchdog_device *wdd) void watchdog_dev_unregister(struct watchdog_device *wdd) { watchdog_unregister_pretimeout(wdd); - device_destroy(&watchdog_class, wdd->wd_data->cdev.dev); watchdog_cdev_unregister(wdd); } |