100 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_next_keepalive()  local
108 		virt_timeout = ktime_add(wd_data->last_keepalive,  in watchdog_next_keepalive()
111 		virt_timeout = wd_data->open_deadline;  in watchdog_next_keepalive()
130 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_update_worker()  local
136 			hrtimer_start(&wd_data->timer, t,  in watchdog_update_worker()
139 		hrtimer_cancel(&wd_data->timer);  in watchdog_update_worker()
145 	struct watchdog_core_data *wd_data = wdd->wd_data;  in __watchdog_ping()  local
149 	earliest_keepalive = ktime_add(wd_data->last_hw_keepalive,  in __watchdog_ping()
154 		hrtimer_start(&wd_data->timer,  in __watchdog_ping()
160 	wd_data->last_hw_keepalive = now;  in __watchdog_ping()
192 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_ping()  local
197 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_ping()
199 	wd_data->last_keepalive = ktime_get();  in watchdog_ping()
203 static bool watchdog_worker_should_ping(struct watchdog_core_data *wd_data)  in watchdog_worker_should_ping()  argument
205 	struct watchdog_device *wdd = wd_data->wdd;  in watchdog_worker_should_ping()
213 	return watchdog_hw_running(wdd) && !watchdog_past_open_deadline(wd_data);  in watchdog_worker_should_ping()
218 	struct watchdog_core_data *wd_data;  in watchdog_ping_work()  local
220 	wd_data = container_of(work, struct watchdog_core_data, work);  in watchdog_ping_work()
222 	mutex_lock(&wd_data->lock);  in watchdog_ping_work()
223 	if (watchdog_worker_should_ping(wd_data))  in watchdog_ping_work()
224 		__watchdog_ping(wd_data->wdd);  in watchdog_ping_work()
225 	mutex_unlock(&wd_data->lock);  in watchdog_ping_work()
230 	struct watchdog_core_data *wd_data;  in watchdog_timer_expired()  local
232 	wd_data = container_of(timer, struct watchdog_core_data, timer);  in watchdog_timer_expired()
234 	kthread_queue_work(watchdog_kworker, &wd_data->work);  in watchdog_timer_expired()
249 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_start()  local
256 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_start()
270 			wd_data->last_keepalive = started_at;  in watchdog_start()
271 			wd_data->last_hw_keepalive = started_at;  in watchdog_start()
331 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_get_status()  local
345 	if (test_bit(_WDOG_ALLOW_RELEASE, &wd_data->status))  in watchdog_get_status()
348 	if (test_and_clear_bit(_WDOG_KEEPALIVE, &wd_data->status))  in watchdog_get_status()
475 	struct watchdog_core_data *wd_data = wdd->wd_data;  in status_show()  local
478 	mutex_lock(&wd_data->lock);  in status_show()
480 	mutex_unlock(&wd_data->lock);  in status_show()
499 	struct watchdog_core_data *wd_data = wdd->wd_data;  in timeleft_show()  local
503 	mutex_lock(&wd_data->lock);  in timeleft_show()
505 	mutex_unlock(&wd_data->lock);  in timeleft_show()
678 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_write()  local
691 	clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
698 			set_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
704 	mutex_lock(&wd_data->lock);  in watchdog_write()
705 	wdd = wd_data->wdd;  in watchdog_write()
708 	mutex_unlock(&wd_data->lock);  in watchdog_write()
731 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_ioctl()  local
738 	mutex_lock(&wd_data->lock);  in watchdog_ioctl()
740 	wdd = wd_data->wdd;  in watchdog_ioctl()
827 	mutex_unlock(&wd_data->lock);  in watchdog_ioctl()
844 	struct watchdog_core_data *wd_data;  in watchdog_open()  local
851 		wd_data = old_wd_data;  in watchdog_open()
853 		wd_data = container_of(inode->i_cdev, struct watchdog_core_data,  in watchdog_open()
857 	if (test_and_set_bit(_WDOG_DEV_OPEN, &wd_data->status))  in watchdog_open()
860 	wdd = wd_data->wdd;  in watchdog_open()
876 	file->private_data = wd_data;  in watchdog_open()
879 		get_device(&wd_data->dev);  in watchdog_open()
888 	wd_data->open_deadline = KTIME_MAX;  in watchdog_open()
894 	module_put(wd_data->wdd->ops->owner);  in watchdog_open()
896 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_open()
902 	struct watchdog_core_data *wd_data;  in watchdog_core_data_release()  local
904 	wd_data = container_of(dev, struct watchdog_core_data, dev);  in watchdog_core_data_release()
906 	kfree(wd_data);  in watchdog_core_data_release()
922 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_release()  local
927 	mutex_lock(&wd_data->lock);  in watchdog_release()
929 	wdd = wd_data->wdd;  in watchdog_release()
940 	else if (test_and_clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status) ||  in watchdog_release()
953 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_release()
957 	mutex_unlock(&wd_data->lock);  in watchdog_release()
964 		module_put(wd_data->cdev.owner);  in watchdog_release()
965 		put_device(&wd_data->dev);  in watchdog_release()
1003 	struct watchdog_core_data *wd_data;  in watchdog_cdev_register()  local
1006 	wd_data = kzalloc(sizeof(struct watchdog_core_data), GFP_KERNEL);  in watchdog_cdev_register()
1007 	if (!wd_data)  in watchdog_cdev_register()
1009 	mutex_init(&wd_data->lock);  in watchdog_cdev_register()
1011 	wd_data->wdd = wdd;  in watchdog_cdev_register()
1012 	wdd->wd_data = wd_data;  in watchdog_cdev_register()
1015 		kfree(wd_data);  in watchdog_cdev_register()
1019 	device_initialize(&wd_data->dev);  in watchdog_cdev_register()
1020 	wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id);  in watchdog_cdev_register()
1021 	wd_data->dev.class = &watchdog_class;  in watchdog_cdev_register()
1022 	wd_data->dev.parent = wdd->parent;  in watchdog_cdev_register()
1023 	wd_data->dev.groups = wdd->groups;  in watchdog_cdev_register()
1024 	wd_data->dev.release = watchdog_core_data_release;  in watchdog_cdev_register()
1025 	dev_set_drvdata(&wd_data->dev, wdd);  in watchdog_cdev_register()
1026 	err = dev_set_name(&wd_data->dev, "watchdog%d", wdd->id);  in watchdog_cdev_register()
1028 		put_device(&wd_data->dev);  in watchdog_cdev_register()
1032 	kthread_init_work(&wd_data->work, watchdog_ping_work);  in watchdog_cdev_register()
1033 	hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD);  in watchdog_cdev_register()
1034 	wd_data->timer.function = watchdog_timer_expired;  in watchdog_cdev_register()
1038 		old_wd_data = wd_data;  in watchdog_cdev_register()
1048 			put_device(&wd_data->dev);  in watchdog_cdev_register()
1054 	cdev_init(&wd_data->cdev, &watchdog_fops);  in watchdog_cdev_register()
1057 	err = cdev_device_add(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_register()
1064 			put_device(&wd_data->dev);  in watchdog_cdev_register()
1069 	wd_data->cdev.owner = wdd->ops->owner;  in watchdog_cdev_register()
1072 	wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);  in watchdog_cdev_register()
1073 	watchdog_set_open_deadline(wd_data);  in watchdog_cdev_register()
1081 		get_device(&wd_data->dev);  in watchdog_cdev_register()
1083 			hrtimer_start(&wd_data->timer, 0,  in watchdog_cdev_register()
1102 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_cdev_unregister()  local
1104 	cdev_device_del(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_unregister()
1117 	mutex_lock(&wd_data->lock);  in watchdog_cdev_unregister()
1118 	wd_data->wdd = NULL;  in watchdog_cdev_unregister()
1119 	wdd->wd_data = NULL;  in watchdog_cdev_unregister()
1120 	mutex_unlock(&wd_data->lock);  in watchdog_cdev_unregister()
1122 	hrtimer_cancel(&wd_data->timer);  in watchdog_cdev_unregister()
1123 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_cdev_unregister()
1125 	put_device(&wd_data->dev);  in watchdog_cdev_unregister()
1182 	struct watchdog_core_data *wd_data;  in watchdog_set_last_hw_keepalive()  local
1188 	wd_data = wdd->wd_data;  in watchdog_set_last_hw_keepalive()
1192 	wd_data->last_hw_keepalive = ktime_sub(now, ms_to_ktime(last_ping_ms));  in watchdog_set_last_hw_keepalive()
1254 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_dev_suspend()  local
1257 	if (!wdd->wd_data)  in watchdog_dev_suspend()
1261 	mutex_lock(&wd_data->lock);  in watchdog_dev_suspend()
1262 	if (watchdog_worker_should_ping(wd_data))  in watchdog_dev_suspend()
1263 		ret = __watchdog_ping(wd_data->wdd);  in watchdog_dev_suspend()
1264 	mutex_unlock(&wd_data->lock);  in watchdog_dev_suspend()
1273 	hrtimer_cancel(&wd_data->timer);  in watchdog_dev_suspend()
1274 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_dev_suspend()
1281 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_dev_resume()  local
1284 	if (!wdd->wd_data)  in watchdog_dev_resume()
1291 	mutex_lock(&wd_data->lock);  in watchdog_dev_resume()
1292 	if (watchdog_worker_should_ping(wd_data))  in watchdog_dev_resume()
1293 		ret = __watchdog_ping(wd_data->wdd);  in watchdog_dev_resume()
1294 	mutex_unlock(&wd_data->lock);  in watchdog_dev_resume()