101 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_next_keepalive()  local
109 		virt_timeout = ktime_add(wd_data->last_keepalive,  in watchdog_next_keepalive()
112 		virt_timeout = wd_data->open_deadline;  in watchdog_next_keepalive()
131 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_update_worker()  local
137 			hrtimer_start(&wd_data->timer, t,  in watchdog_update_worker()
140 		hrtimer_cancel(&wd_data->timer);  in watchdog_update_worker()
146 	struct watchdog_core_data *wd_data = wdd->wd_data;  in __watchdog_ping()  local
150 	earliest_keepalive = ktime_add(wd_data->last_hw_keepalive,  in __watchdog_ping()
155 		hrtimer_start(&wd_data->timer,  in __watchdog_ping()
161 	wd_data->last_hw_keepalive = now;  in __watchdog_ping()
193 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_ping()  local
198 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_ping()
200 	wd_data->last_keepalive = ktime_get();  in watchdog_ping()
204 static bool watchdog_worker_should_ping(struct watchdog_core_data *wd_data)  in watchdog_worker_should_ping()  argument
206 	struct watchdog_device *wdd = wd_data->wdd;  in watchdog_worker_should_ping()
214 	return watchdog_hw_running(wdd) && !watchdog_past_open_deadline(wd_data);  in watchdog_worker_should_ping()
219 	struct watchdog_core_data *wd_data;  in watchdog_ping_work()  local
221 	wd_data = container_of(work, struct watchdog_core_data, work);  in watchdog_ping_work()
223 	mutex_lock(&wd_data->lock);  in watchdog_ping_work()
224 	if (watchdog_worker_should_ping(wd_data))  in watchdog_ping_work()
225 		__watchdog_ping(wd_data->wdd);  in watchdog_ping_work()
226 	mutex_unlock(&wd_data->lock);  in watchdog_ping_work()
231 	struct watchdog_core_data *wd_data;  in watchdog_timer_expired()  local
233 	wd_data = container_of(timer, struct watchdog_core_data, timer);  in watchdog_timer_expired()
235 	kthread_queue_work(watchdog_kworker, &wd_data->work);  in watchdog_timer_expired()
250 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_start()  local
257 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_start()
272 			wd_data->last_keepalive = started_at;  in watchdog_start()
273 			wd_data->last_hw_keepalive = started_at;  in watchdog_start()
333 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_get_status()  local
347 	if (test_bit(_WDOG_ALLOW_RELEASE, &wd_data->status))  in watchdog_get_status()
350 	if (test_and_clear_bit(_WDOG_KEEPALIVE, &wd_data->status))  in watchdog_get_status()
436 		struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_get_timeleft()  local
437 		s64 last_keepalive_ms = ktime_ms_delta(ktime_get(), wd_data->last_keepalive);  in watchdog_get_timeleft()
479 	struct watchdog_core_data *wd_data = wdd->wd_data;  in status_show()  local
482 	mutex_lock(&wd_data->lock);  in status_show()
484 	mutex_unlock(&wd_data->lock);  in status_show()
503 	struct watchdog_core_data *wd_data = wdd->wd_data;  in timeleft_show()  local
506 	mutex_lock(&wd_data->lock);  in timeleft_show()
508 	mutex_unlock(&wd_data->lock);  in timeleft_show()
697 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_write()  local
710 	clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
717 			set_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
723 	mutex_lock(&wd_data->lock);  in watchdog_write()
724 	wdd = wd_data->wdd;  in watchdog_write()
727 	mutex_unlock(&wd_data->lock);  in watchdog_write()
750 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_ioctl()  local
757 	mutex_lock(&wd_data->lock);  in watchdog_ioctl()
759 	wdd = wd_data->wdd;  in watchdog_ioctl()
844 	mutex_unlock(&wd_data->lock);  in watchdog_ioctl()
861 	struct watchdog_core_data *wd_data;  in watchdog_open()  local
868 		wd_data = old_wd_data;  in watchdog_open()
870 		wd_data = container_of(inode->i_cdev, struct watchdog_core_data,  in watchdog_open()
874 	if (test_and_set_bit(_WDOG_DEV_OPEN, &wd_data->status))  in watchdog_open()
877 	wdd = wd_data->wdd;  in watchdog_open()
893 	file->private_data = wd_data;  in watchdog_open()
896 		get_device(&wd_data->dev);  in watchdog_open()
905 	wd_data->open_deadline = KTIME_MAX;  in watchdog_open()
911 	module_put(wd_data->wdd->ops->owner);  in watchdog_open()
913 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_open()
919 	struct watchdog_core_data *wd_data;  in watchdog_core_data_release()  local
921 	wd_data = container_of(dev, struct watchdog_core_data, dev);  in watchdog_core_data_release()
923 	kfree(wd_data);  in watchdog_core_data_release()
939 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_release()  local
944 	mutex_lock(&wd_data->lock);  in watchdog_release()
946 	wdd = wd_data->wdd;  in watchdog_release()
957 	else if (test_and_clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status) ||  in watchdog_release()
970 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_release()
974 	mutex_unlock(&wd_data->lock);  in watchdog_release()
981 		module_put(wd_data->cdev.owner);  in watchdog_release()
982 		put_device(&wd_data->dev);  in watchdog_release()
1019 	struct watchdog_core_data *wd_data;  in watchdog_cdev_register()  local
1022 	wd_data = kzalloc_obj(struct watchdog_core_data);  in watchdog_cdev_register()
1023 	if (!wd_data)  in watchdog_cdev_register()
1025 	mutex_init(&wd_data->lock);  in watchdog_cdev_register()
1027 	wd_data->wdd = wdd;  in watchdog_cdev_register()
1028 	wdd->wd_data = wd_data;  in watchdog_cdev_register()
1031 		kfree(wd_data);  in watchdog_cdev_register()
1035 	device_initialize(&wd_data->dev);  in watchdog_cdev_register()
1036 	wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id);  in watchdog_cdev_register()
1037 	wd_data->dev.class = &watchdog_class;  in watchdog_cdev_register()
1038 	wd_data->dev.parent = wdd->parent;  in watchdog_cdev_register()
1039 	wd_data->dev.groups = wdd->groups;  in watchdog_cdev_register()
1040 	wd_data->dev.release = watchdog_core_data_release;  in watchdog_cdev_register()
1041 	dev_set_drvdata(&wd_data->dev, wdd);  in watchdog_cdev_register()
1042 	err = dev_set_name(&wd_data->dev, "watchdog%d", wdd->id);  in watchdog_cdev_register()
1044 		put_device(&wd_data->dev);  in watchdog_cdev_register()
1048 	kthread_init_work(&wd_data->work, watchdog_ping_work);  in watchdog_cdev_register()
1049 	hrtimer_setup(&wd_data->timer, watchdog_timer_expired, CLOCK_MONOTONIC,  in watchdog_cdev_register()
1054 		old_wd_data = wd_data;  in watchdog_cdev_register()
1064 			put_device(&wd_data->dev);  in watchdog_cdev_register()
1070 	cdev_init(&wd_data->cdev, &watchdog_fops);  in watchdog_cdev_register()
1071 	wd_data->cdev.owner = wdd->ops->owner;  in watchdog_cdev_register()
1074 	err = cdev_device_add(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_register()
1082 		put_device(&wd_data->dev);  in watchdog_cdev_register()
1087 	wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);  in watchdog_cdev_register()
1088 	watchdog_set_open_deadline(wd_data);  in watchdog_cdev_register()
1096 		get_device(&wd_data->dev);  in watchdog_cdev_register()
1098 			hrtimer_start(&wd_data->timer, 0,  in watchdog_cdev_register()
1117 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_cdev_unregister()  local
1119 	cdev_device_del(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_unregister()
1132 	mutex_lock(&wd_data->lock);  in watchdog_cdev_unregister()
1133 	wd_data->wdd = NULL;  in watchdog_cdev_unregister()
1134 	wdd->wd_data = NULL;  in watchdog_cdev_unregister()
1135 	mutex_unlock(&wd_data->lock);  in watchdog_cdev_unregister()
1137 	hrtimer_cancel(&wd_data->timer);  in watchdog_cdev_unregister()
1138 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_cdev_unregister()
1140 	put_device(&wd_data->dev);  in watchdog_cdev_unregister()
1197 	struct watchdog_core_data *wd_data;  in watchdog_set_last_hw_keepalive()  local
1203 	wd_data = wdd->wd_data;  in watchdog_set_last_hw_keepalive()
1207 	wd_data->last_hw_keepalive = ktime_sub(now, ms_to_ktime(last_ping_ms));  in watchdog_set_last_hw_keepalive()
1269 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_dev_suspend()  local
1272 	if (!wdd->wd_data)  in watchdog_dev_suspend()
1276 	mutex_lock(&wd_data->lock);  in watchdog_dev_suspend()
1277 	if (watchdog_worker_should_ping(wd_data))  in watchdog_dev_suspend()
1278 		ret = __watchdog_ping(wd_data->wdd);  in watchdog_dev_suspend()
1279 	mutex_unlock(&wd_data->lock);  in watchdog_dev_suspend()
1288 	hrtimer_cancel(&wd_data->timer);  in watchdog_dev_suspend()
1289 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_dev_suspend()
1296 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_dev_resume()  local
1299 	if (!wdd->wd_data)  in watchdog_dev_resume()
1306 	mutex_lock(&wd_data->lock);  in watchdog_dev_resume()
1307 	if (watchdog_worker_should_ping(wd_data))  in watchdog_dev_resume()
1308 		ret = __watchdog_ping(wd_data->wdd);  in watchdog_dev_resume()
1309 	mutex_unlock(&wd_data->lock);  in watchdog_dev_resume()