#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 */
/*
* 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;
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);
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);
}
*/
if (!running) {
module_put(wd_data->cdev.owner);
- kref_put(&wd_data->kref, watchdog_core_data_release);
+ put_device(&wd_data->dev);
}
return 0;
}
.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;
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;
}
}
+ 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;
*/
if (watchdog_hw_running(wdd)) {
__module_get(wdd->ops->owner);
- kref_get(&wd_data->kref);
+ get_device(&wd_data->dev);
queue_delayed_work(watchdog_wq, &wd_data->work, 0);
}
{
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;
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
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);
}
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);
}