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()
477 	struct watchdog_core_data *wd_data = wdd->wd_data;  in status_show()  local
480 	mutex_lock(&wd_data->lock);  in status_show()
482 	mutex_unlock(&wd_data->lock);  in status_show()
501 	struct watchdog_core_data *wd_data = wdd->wd_data;  in timeleft_show()  local
505 	mutex_lock(&wd_data->lock);  in timeleft_show()
507 	mutex_unlock(&wd_data->lock);  in timeleft_show()
700 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_write()  local
713 	clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
720 			set_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
726 	mutex_lock(&wd_data->lock);  in watchdog_write()
727 	wdd = wd_data->wdd;  in watchdog_write()
730 	mutex_unlock(&wd_data->lock);  in watchdog_write()
753 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_ioctl()  local
760 	mutex_lock(&wd_data->lock);  in watchdog_ioctl()
762 	wdd = wd_data->wdd;  in watchdog_ioctl()
849 	mutex_unlock(&wd_data->lock);  in watchdog_ioctl()
866 	struct watchdog_core_data *wd_data;  in watchdog_open()  local
873 		wd_data = old_wd_data;  in watchdog_open()
875 		wd_data = container_of(inode->i_cdev, struct watchdog_core_data,  in watchdog_open()
879 	if (test_and_set_bit(_WDOG_DEV_OPEN, &wd_data->status))  in watchdog_open()
882 	wdd = wd_data->wdd;  in watchdog_open()
898 	file->private_data = wd_data;  in watchdog_open()
901 		get_device(&wd_data->dev);  in watchdog_open()
910 	wd_data->open_deadline = KTIME_MAX;  in watchdog_open()
916 	module_put(wd_data->wdd->ops->owner);  in watchdog_open()
918 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_open()
924 	struct watchdog_core_data *wd_data;  in watchdog_core_data_release()  local
926 	wd_data = container_of(dev, struct watchdog_core_data, dev);  in watchdog_core_data_release()
928 	kfree(wd_data);  in watchdog_core_data_release()
944 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_release()  local
949 	mutex_lock(&wd_data->lock);  in watchdog_release()
951 	wdd = wd_data->wdd;  in watchdog_release()
962 	else if (test_and_clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status) ||  in watchdog_release()
975 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_release()
979 	mutex_unlock(&wd_data->lock);  in watchdog_release()
986 		module_put(wd_data->cdev.owner);  in watchdog_release()
987 		put_device(&wd_data->dev);  in watchdog_release()
1024 	struct watchdog_core_data *wd_data;  in watchdog_cdev_register()  local
1027 	wd_data = kzalloc(sizeof(struct watchdog_core_data), GFP_KERNEL);  in watchdog_cdev_register()
1028 	if (!wd_data)  in watchdog_cdev_register()
1030 	mutex_init(&wd_data->lock);  in watchdog_cdev_register()
1032 	wd_data->wdd = wdd;  in watchdog_cdev_register()
1033 	wdd->wd_data = wd_data;  in watchdog_cdev_register()
1036 		kfree(wd_data);  in watchdog_cdev_register()
1040 	device_initialize(&wd_data->dev);  in watchdog_cdev_register()
1041 	wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id);  in watchdog_cdev_register()
1042 	wd_data->dev.class = &watchdog_class;  in watchdog_cdev_register()
1043 	wd_data->dev.parent = wdd->parent;  in watchdog_cdev_register()
1044 	wd_data->dev.groups = wdd->groups;  in watchdog_cdev_register()
1045 	wd_data->dev.release = watchdog_core_data_release;  in watchdog_cdev_register()
1046 	dev_set_drvdata(&wd_data->dev, wdd);  in watchdog_cdev_register()
1047 	err = dev_set_name(&wd_data->dev, "watchdog%d", wdd->id);  in watchdog_cdev_register()
1049 		put_device(&wd_data->dev);  in watchdog_cdev_register()
1053 	kthread_init_work(&wd_data->work, watchdog_ping_work);  in watchdog_cdev_register()
1054 	hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD);  in watchdog_cdev_register()
1055 	wd_data->timer.function = watchdog_timer_expired;  in watchdog_cdev_register()
1059 		old_wd_data = wd_data;  in watchdog_cdev_register()
1069 			put_device(&wd_data->dev);  in watchdog_cdev_register()
1075 	cdev_init(&wd_data->cdev, &watchdog_fops);  in watchdog_cdev_register()
1078 	err = cdev_device_add(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_register()
1086 		put_device(&wd_data->dev);  in watchdog_cdev_register()
1090 	wd_data->cdev.owner = wdd->ops->owner;  in watchdog_cdev_register()
1093 	wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);  in watchdog_cdev_register()
1094 	watchdog_set_open_deadline(wd_data);  in watchdog_cdev_register()
1102 		get_device(&wd_data->dev);  in watchdog_cdev_register()
1104 			hrtimer_start(&wd_data->timer, 0,  in watchdog_cdev_register()
1123 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_cdev_unregister()  local
1125 	cdev_device_del(&wd_data->cdev, &wd_data->dev);  in watchdog_cdev_unregister()
1138 	mutex_lock(&wd_data->lock);  in watchdog_cdev_unregister()
1139 	wd_data->wdd = NULL;  in watchdog_cdev_unregister()
1140 	wdd->wd_data = NULL;  in watchdog_cdev_unregister()
1141 	mutex_unlock(&wd_data->lock);  in watchdog_cdev_unregister()
1143 	hrtimer_cancel(&wd_data->timer);  in watchdog_cdev_unregister()
1144 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_cdev_unregister()
1146 	put_device(&wd_data->dev);  in watchdog_cdev_unregister()
1203 	struct watchdog_core_data *wd_data;  in watchdog_set_last_hw_keepalive()  local
1209 	wd_data = wdd->wd_data;  in watchdog_set_last_hw_keepalive()
1213 	wd_data->last_hw_keepalive = ktime_sub(now, ms_to_ktime(last_ping_ms));  in watchdog_set_last_hw_keepalive()
1275 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_dev_suspend()  local
1278 	if (!wdd->wd_data)  in watchdog_dev_suspend()
1282 	mutex_lock(&wd_data->lock);  in watchdog_dev_suspend()
1283 	if (watchdog_worker_should_ping(wd_data))  in watchdog_dev_suspend()
1284 		ret = __watchdog_ping(wd_data->wdd);  in watchdog_dev_suspend()
1285 	mutex_unlock(&wd_data->lock);  in watchdog_dev_suspend()
1294 	hrtimer_cancel(&wd_data->timer);  in watchdog_dev_suspend()
1295 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_dev_suspend()
1302 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_dev_resume()  local
1305 	if (!wdd->wd_data)  in watchdog_dev_resume()
1312 	mutex_lock(&wd_data->lock);  in watchdog_dev_resume()
1313 	if (watchdog_worker_should_ping(wd_data))  in watchdog_dev_resume()
1314 		ret = __watchdog_ping(wd_data->wdd);  in watchdog_dev_resume()
1315 	mutex_unlock(&wd_data->lock);  in watchdog_dev_resume()