125 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_next_keepalive()  local
133 		virt_timeout = ktime_add(wd_data->last_keepalive,  in watchdog_next_keepalive()
136 		virt_timeout = wd_data->open_deadline;  in watchdog_next_keepalive()
155 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_update_worker()  local
161 			hrtimer_start(&wd_data->timer, t, HRTIMER_MODE_REL);  in watchdog_update_worker()
163 		hrtimer_cancel(&wd_data->timer);  in watchdog_update_worker()
169 	struct watchdog_core_data *wd_data = wdd->wd_data;  in __watchdog_ping()  local
173 	earliest_keepalive = ktime_add(wd_data->last_hw_keepalive,  in __watchdog_ping()
178 		hrtimer_start(&wd_data->timer,  in __watchdog_ping()
184 	wd_data->last_hw_keepalive = now;  in __watchdog_ping()
210 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_ping()  local
215 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_ping()
217 	wd_data->last_keepalive = ktime_get();  in watchdog_ping()
221 static bool watchdog_worker_should_ping(struct watchdog_core_data *wd_data)  in watchdog_worker_should_ping()  argument
223 	struct watchdog_device *wdd = wd_data->wdd;  in watchdog_worker_should_ping()
231 	return watchdog_hw_running(wdd) && !watchdog_past_open_deadline(wd_data);  in watchdog_worker_should_ping()
236 	struct watchdog_core_data *wd_data;  in watchdog_ping_work()  local
238 	wd_data = container_of(work, struct watchdog_core_data, work);  in watchdog_ping_work()
240 	mutex_lock(&wd_data->lock);  in watchdog_ping_work()
241 	if (watchdog_worker_should_ping(wd_data))  in watchdog_ping_work()
242 		__watchdog_ping(wd_data->wdd);  in watchdog_ping_work()
243 	mutex_unlock(&wd_data->lock);  in watchdog_ping_work()
248 	struct watchdog_core_data *wd_data;  in watchdog_timer_expired()  local
250 	wd_data = container_of(timer, struct watchdog_core_data, timer);  in watchdog_timer_expired()
252 	kthread_queue_work(watchdog_kworker, &wd_data->work);  in watchdog_timer_expired()
269 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_start()  local
276 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_start()
285 		wd_data->last_keepalive = started_at;  in watchdog_start()
343 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_get_status()  local
357 	if (test_bit(_WDOG_ALLOW_RELEASE, &wd_data->status))  in watchdog_get_status()
360 	if (test_and_clear_bit(_WDOG_KEEPALIVE, &wd_data->status))  in watchdog_get_status()
461 	struct watchdog_core_data *wd_data = wdd->wd_data;  in status_show()  local
464 	mutex_lock(&wd_data->lock);  in status_show()
466 	mutex_unlock(&wd_data->lock);  in status_show()
485 	struct watchdog_core_data *wd_data = wdd->wd_data;  in timeleft_show()  local
489 	mutex_lock(&wd_data->lock);  in timeleft_show()
491 	mutex_unlock(&wd_data->lock);  in timeleft_show()
644 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_write()  local
657 	clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
664 			set_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
670 	mutex_lock(&wd_data->lock);  in watchdog_write()
671 	wdd = wd_data->wdd;  in watchdog_write()
674 	mutex_unlock(&wd_data->lock);  in watchdog_write()
695 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_ioctl()  local
702 	mutex_lock(&wd_data->lock);  in watchdog_ioctl()
704 	wdd = wd_data->wdd;  in watchdog_ioctl()
791 	mutex_unlock(&wd_data->lock);  in watchdog_ioctl()
807 	struct watchdog_core_data *wd_data;  in watchdog_open()  local
814 		wd_data = old_wd_data;  in watchdog_open()
816 		wd_data = container_of(inode->i_cdev, struct watchdog_core_data,  in watchdog_open()
820 	if (test_and_set_bit(_WDOG_DEV_OPEN, &wd_data->status))  in watchdog_open()
823 	wdd = wd_data->wdd;  in watchdog_open()
839 	file->private_data = wd_data;  in watchdog_open()
842 		kref_get(&wd_data->kref);  in watchdog_open()
851 	wd_data->open_deadline = KTIME_MAX;  in watchdog_open()
857 	module_put(wd_data->wdd->ops->owner);  in watchdog_open()
859 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_open()
865 	struct watchdog_core_data *wd_data;  in watchdog_core_data_release()  local
867 	wd_data = container_of(kref, struct watchdog_core_data, kref);  in watchdog_core_data_release()
869 	kfree(wd_data);  in watchdog_core_data_release()
884 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_release()  local
889 	mutex_lock(&wd_data->lock);  in watchdog_release()
891 	wdd = wd_data->wdd;  in watchdog_release()
902 	else if (test_and_clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status) ||  in watchdog_release()
915 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_release()
919 	mutex_unlock(&wd_data->lock);  in watchdog_release()
926 		module_put(wd_data->cdev.owner);  in watchdog_release()
927 		kref_put(&wd_data->kref, watchdog_core_data_release);  in watchdog_release()
958 	struct watchdog_core_data *wd_data;  in watchdog_cdev_register()  local
961 	wd_data = kzalloc(sizeof(struct watchdog_core_data), GFP_KERNEL);  in watchdog_cdev_register()
962 	if (!wd_data)  in watchdog_cdev_register()
964 	kref_init(&wd_data->kref);  in watchdog_cdev_register()
965 	mutex_init(&wd_data->lock);  in watchdog_cdev_register()
967 	wd_data->wdd = wdd;  in watchdog_cdev_register()
968 	wdd->wd_data = wd_data;  in watchdog_cdev_register()
973 	kthread_init_work(&wd_data->work, watchdog_ping_work);  in watchdog_cdev_register()
974 	hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);  in watchdog_cdev_register()
975 	wd_data->timer.function = watchdog_timer_expired;  in watchdog_cdev_register()
978 		old_wd_data = wd_data;  in watchdog_cdev_register()
988 			kfree(wd_data);  in watchdog_cdev_register()
994 	cdev_init(&wd_data->cdev, &watchdog_fops);  in watchdog_cdev_register()
995 	wd_data->cdev.owner = wdd->ops->owner;  in watchdog_cdev_register()
998 	err = cdev_add(&wd_data->cdev, devno, 1);  in watchdog_cdev_register()
1005 			kref_put(&wd_data->kref, watchdog_core_data_release);  in watchdog_cdev_register()
1011 	wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);  in watchdog_cdev_register()
1012 	watchdog_set_open_deadline(wd_data);  in watchdog_cdev_register()
1020 		kref_get(&wd_data->kref);  in watchdog_cdev_register()
1022 			hrtimer_start(&wd_data->timer, 0, HRTIMER_MODE_REL);  in watchdog_cdev_register()
1041 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_cdev_unregister()  local
1043 	cdev_del(&wd_data->cdev);  in watchdog_cdev_unregister()
1054 	mutex_lock(&wd_data->lock);  in watchdog_cdev_unregister()
1055 	wd_data->wdd = NULL;  in watchdog_cdev_unregister()
1056 	wdd->wd_data = NULL;  in watchdog_cdev_unregister()
1057 	mutex_unlock(&wd_data->lock);  in watchdog_cdev_unregister()
1059 	hrtimer_cancel(&wd_data->timer);  in watchdog_cdev_unregister()
1060 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_cdev_unregister()
1062 	kref_put(&wd_data->kref, watchdog_core_data_release);  in watchdog_cdev_unregister()
1151 	device_destroy(&watchdog_class, wdd->wd_data->cdev.dev);  in watchdog_dev_unregister()