121 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_next_keepalive()  local
129 		virt_timeout = ktime_add(wd_data->last_keepalive,  in watchdog_next_keepalive()
132 		virt_timeout = wd_data->open_deadline;  in watchdog_next_keepalive()
151 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_update_worker()  local
157 			hrtimer_start(&wd_data->timer, t,  in watchdog_update_worker()
160 		hrtimer_cancel(&wd_data->timer);  in watchdog_update_worker()
166 	struct watchdog_core_data *wd_data = wdd->wd_data;  in __watchdog_ping()  local
170 	earliest_keepalive = ktime_add(wd_data->last_hw_keepalive,  in __watchdog_ping()
175 		hrtimer_start(&wd_data->timer,  in __watchdog_ping()
181 	wd_data->last_hw_keepalive = now;  in __watchdog_ping()
207 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_ping()  local
212 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_ping()
214 	wd_data->last_keepalive = ktime_get();  in watchdog_ping()
218 static bool watchdog_worker_should_ping(struct watchdog_core_data *wd_data)  in watchdog_worker_should_ping()  argument
220 	struct watchdog_device *wdd = wd_data->wdd;  in watchdog_worker_should_ping()
228 	return watchdog_hw_running(wdd) && !watchdog_past_open_deadline(wd_data);  in watchdog_worker_should_ping()
233 	struct watchdog_core_data *wd_data;  in watchdog_ping_work()  local
235 	wd_data = container_of(work, struct watchdog_core_data, work);  in watchdog_ping_work()
237 	mutex_lock(&wd_data->lock);  in watchdog_ping_work()
238 	if (watchdog_worker_should_ping(wd_data))  in watchdog_ping_work()
239 		__watchdog_ping(wd_data->wdd);  in watchdog_ping_work()
240 	mutex_unlock(&wd_data->lock);  in watchdog_ping_work()
245 	struct watchdog_core_data *wd_data;  in watchdog_timer_expired()  local
247 	wd_data = container_of(timer, struct watchdog_core_data, timer);  in watchdog_timer_expired()
249 	kthread_queue_work(watchdog_kworker, &wd_data->work);  in watchdog_timer_expired()
266 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_start()  local
273 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_start()
284 			wd_data->last_keepalive = started_at;  in watchdog_start()
285 			wd_data->last_hw_keepalive = started_at;  in watchdog_start()
344 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_get_status()  local
358 	if (test_bit(_WDOG_ALLOW_RELEASE, &wd_data->status))  in watchdog_get_status()
361 	if (test_and_clear_bit(_WDOG_KEEPALIVE, &wd_data->status))  in watchdog_get_status()
481 	struct watchdog_core_data *wd_data = wdd->wd_data;  in status_show()  local
484 	mutex_lock(&wd_data->lock);  in status_show()
486 	mutex_unlock(&wd_data->lock);  in status_show()
505 	struct watchdog_core_data *wd_data = wdd->wd_data;  in timeleft_show()  local
509 	mutex_lock(&wd_data->lock);  in timeleft_show()
511 	mutex_unlock(&wd_data->lock);  in timeleft_show()
664 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_write()  local
677 	clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
684 			set_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
690 	mutex_lock(&wd_data->lock);  in watchdog_write()
691 	wdd = wd_data->wdd;  in watchdog_write()
694 	mutex_unlock(&wd_data->lock);  in watchdog_write()
715 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_ioctl()  local
722 	mutex_lock(&wd_data->lock);  in watchdog_ioctl()
724 	wdd = wd_data->wdd;  in watchdog_ioctl()
811 	mutex_unlock(&wd_data->lock);  in watchdog_ioctl()
827 	struct watchdog_core_data *wd_data;  in watchdog_open()  local
834 		wd_data = old_wd_data;  in watchdog_open()
836 		wd_data = container_of(inode->i_cdev, struct watchdog_core_data,  in watchdog_open()
840 	if (test_and_set_bit(_WDOG_DEV_OPEN, &wd_data->status))  in watchdog_open()
843 	wdd = wd_data->wdd;  in watchdog_open()
859 	file->private_data = wd_data;  in watchdog_open()
862 		get_device(&wd_data->dev);  in watchdog_open()
871 	wd_data->open_deadline = KTIME_MAX;  in watchdog_open()
877 	module_put(wd_data->wdd->ops->owner);  in watchdog_open()
879 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_open()
885 	struct watchdog_core_data *wd_data;  in watchdog_core_data_release()  local
887 	wd_data = container_of(dev, struct watchdog_core_data, dev);  in watchdog_core_data_release()
889 	kfree(wd_data);  in watchdog_core_data_release()
904 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_release()  local
909 	mutex_lock(&wd_data->lock);  in watchdog_release()
911 	wdd = wd_data->wdd;  in watchdog_release()
922 	else if (test_and_clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status) ||  in watchdog_release()
935 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_release()
939 	mutex_unlock(&wd_data->lock);  in watchdog_release()
946 		module_put(wd_data->cdev.owner);  in watchdog_release()
947 		put_device(&wd_data->dev);  in watchdog_release()
984 	struct watchdog_core_data *wd_data;  in watchdog_cdev_register()  local
987 	wd_data = kzalloc(sizeof(struct watchdog_core_data), GFP_KERNEL);  in watchdog_cdev_register()
988 	if (!wd_data)  in watchdog_cdev_register()
990 	mutex_init(&wd_data->lock);  in watchdog_cdev_register()
992 	wd_data->wdd = wdd;  in watchdog_cdev_register()
993 	wdd->wd_data = wd_data;  in watchdog_cdev_register()
996 		kfree(wd_data);  in watchdog_cdev_register()
1000 	device_initialize(&wd_data->dev);  in watchdog_cdev_register()
1001 	wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id);  in watchdog_cdev_register()
1002 	wd_data->dev.class = &watchdog_class;  in watchdog_cdev_register()
1003 	wd_data->dev.parent = wdd->parent;  in watchdog_cdev_register()
1004 	wd_data->dev.groups = wdd->groups;  in watchdog_cdev_register()
1005 	wd_data->dev.release = watchdog_core_data_release;  in watchdog_cdev_register()
1006 	dev_set_drvdata(&wd_data->dev, wdd);  in watchdog_cdev_register()
1007 	dev_set_name(&wd_data->dev, "watchdog%d", wdd->id);  in watchdog_cdev_register()
1009 	kthread_init_work(&wd_data->work, watchdog_ping_work);  in watchdog_cdev_register()
1010 	hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD);  in watchdog_cdev_register()
1011 	wd_data->timer.function = watchdog_timer_expired;  in watchdog_cdev_register()
1014 		old_wd_data = wd_data;  in watchdog_cdev_register()
1024 			put_device(&wd_data->dev);  in watchdog_cdev_register()
1030 	cdev_init(&wd_data->cdev, &watchdog_fops);  in watchdog_cdev_register()
1033 	err = cdev_device_add(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_register()
1040 			put_device(&wd_data->dev);  in watchdog_cdev_register()
1045 	wd_data->cdev.owner = wdd->ops->owner;  in watchdog_cdev_register()
1048 	wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);  in watchdog_cdev_register()
1049 	watchdog_set_open_deadline(wd_data);  in watchdog_cdev_register()
1057 		get_device(&wd_data->dev);  in watchdog_cdev_register()
1059 			hrtimer_start(&wd_data->timer, 0,  in watchdog_cdev_register()
1079 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_cdev_unregister()  local
1081 	cdev_device_del(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_unregister()
1092 	mutex_lock(&wd_data->lock);  in watchdog_cdev_unregister()
1093 	wd_data->wdd = NULL;  in watchdog_cdev_unregister()
1094 	wdd->wd_data = NULL;  in watchdog_cdev_unregister()
1095 	mutex_unlock(&wd_data->lock);  in watchdog_cdev_unregister()
1097 	hrtimer_cancel(&wd_data->timer);  in watchdog_cdev_unregister()
1098 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_cdev_unregister()
1100 	put_device(&wd_data->dev);  in watchdog_cdev_unregister()
1155 	struct watchdog_core_data *wd_data;  in watchdog_set_last_hw_keepalive()  local
1161 	wd_data = wdd->wd_data;  in watchdog_set_last_hw_keepalive()
1165 	wd_data->last_hw_keepalive = ktime_sub(now, ms_to_ktime(last_ping_ms));  in watchdog_set_last_hw_keepalive()