115 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_next_keepalive()  local
122 	virt_timeout = ktime_add(wd_data->last_keepalive,  in watchdog_next_keepalive()
144 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_update_worker()  local
150 			hrtimer_start(&wd_data->timer, t, HRTIMER_MODE_REL);  in watchdog_update_worker()
152 		hrtimer_cancel(&wd_data->timer);  in watchdog_update_worker()
158 	struct watchdog_core_data *wd_data = wdd->wd_data;  in __watchdog_ping()  local
162 	earliest_keepalive = ktime_add(wd_data->last_hw_keepalive,  in __watchdog_ping()
167 		hrtimer_start(&wd_data->timer,  in __watchdog_ping()
173 	wd_data->last_hw_keepalive = now;  in __watchdog_ping()
199 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_ping()  local
204 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_ping()
206 	wd_data->last_keepalive = ktime_get();  in watchdog_ping()
210 static bool watchdog_worker_should_ping(struct watchdog_core_data *wd_data)  in watchdog_worker_should_ping()  argument
212 	struct watchdog_device *wdd = wd_data->wdd;  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()
252 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_start()  local
259 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);  in watchdog_start()
268 		wd_data->last_keepalive = started_at;  in watchdog_start()
326 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_get_status()  local
340 	if (test_bit(_WDOG_ALLOW_RELEASE, &wd_data->status))  in watchdog_get_status()
343 	if (test_and_clear_bit(_WDOG_KEEPALIVE, &wd_data->status))  in watchdog_get_status()
444 	struct watchdog_core_data *wd_data = wdd->wd_data;  in status_show()  local
447 	mutex_lock(&wd_data->lock);  in status_show()
449 	mutex_unlock(&wd_data->lock);  in status_show()
468 	struct watchdog_core_data *wd_data = wdd->wd_data;  in timeleft_show()  local
472 	mutex_lock(&wd_data->lock);  in timeleft_show()
474 	mutex_unlock(&wd_data->lock);  in timeleft_show()
627 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_write()  local
640 	clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
647 			set_bit(_WDOG_ALLOW_RELEASE, &wd_data->status);  in watchdog_write()
653 	mutex_lock(&wd_data->lock);  in watchdog_write()
654 	wdd = wd_data->wdd;  in watchdog_write()
657 	mutex_unlock(&wd_data->lock);  in watchdog_write()
678 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_ioctl()  local
685 	mutex_lock(&wd_data->lock);  in watchdog_ioctl()
687 	wdd = wd_data->wdd;  in watchdog_ioctl()
774 	mutex_unlock(&wd_data->lock);  in watchdog_ioctl()
790 	struct watchdog_core_data *wd_data;  in watchdog_open()  local
797 		wd_data = old_wd_data;  in watchdog_open()
799 		wd_data = container_of(inode->i_cdev, struct watchdog_core_data,  in watchdog_open()
803 	if (test_and_set_bit(_WDOG_DEV_OPEN, &wd_data->status))  in watchdog_open()
806 	wdd = wd_data->wdd;  in watchdog_open()
822 	file->private_data = wd_data;  in watchdog_open()
825 		kref_get(&wd_data->kref);  in watchdog_open()
831 	module_put(wd_data->wdd->ops->owner);  in watchdog_open()
833 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_open()
839 	struct watchdog_core_data *wd_data;  in watchdog_core_data_release()  local
841 	wd_data = container_of(kref, struct watchdog_core_data, kref);  in watchdog_core_data_release()
843 	kfree(wd_data);  in watchdog_core_data_release()
858 	struct watchdog_core_data *wd_data = file->private_data;  in watchdog_release()  local
863 	mutex_lock(&wd_data->lock);  in watchdog_release()
865 	wdd = wd_data->wdd;  in watchdog_release()
876 	else if (test_and_clear_bit(_WDOG_ALLOW_RELEASE, &wd_data->status) ||  in watchdog_release()
889 	clear_bit(_WDOG_DEV_OPEN, &wd_data->status);  in watchdog_release()
893 	mutex_unlock(&wd_data->lock);  in watchdog_release()
900 		module_put(wd_data->cdev.owner);  in watchdog_release()
901 		kref_put(&wd_data->kref, watchdog_core_data_release);  in watchdog_release()
932 	struct watchdog_core_data *wd_data;  in watchdog_cdev_register()  local
935 	wd_data = kzalloc(sizeof(struct watchdog_core_data), GFP_KERNEL);  in watchdog_cdev_register()
936 	if (!wd_data)  in watchdog_cdev_register()
938 	kref_init(&wd_data->kref);  in watchdog_cdev_register()
939 	mutex_init(&wd_data->lock);  in watchdog_cdev_register()
941 	wd_data->wdd = wdd;  in watchdog_cdev_register()
942 	wdd->wd_data = wd_data;  in watchdog_cdev_register()
947 	kthread_init_work(&wd_data->work, watchdog_ping_work);  in watchdog_cdev_register()
948 	hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);  in watchdog_cdev_register()
949 	wd_data->timer.function = watchdog_timer_expired;  in watchdog_cdev_register()
952 		old_wd_data = wd_data;  in watchdog_cdev_register()
962 			kfree(wd_data);  in watchdog_cdev_register()
968 	cdev_init(&wd_data->cdev, &watchdog_fops);  in watchdog_cdev_register()
969 	wd_data->cdev.owner = wdd->ops->owner;  in watchdog_cdev_register()
972 	err = cdev_add(&wd_data->cdev, devno, 1);  in watchdog_cdev_register()
979 			kref_put(&wd_data->kref, watchdog_core_data_release);  in watchdog_cdev_register()
985 	wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);  in watchdog_cdev_register()
993 		kref_get(&wd_data->kref);  in watchdog_cdev_register()
995 			hrtimer_start(&wd_data->timer, 0, HRTIMER_MODE_REL);  in watchdog_cdev_register()
1014 	struct watchdog_core_data *wd_data = wdd->wd_data;  in watchdog_cdev_unregister()  local
1016 	cdev_del(&wd_data->cdev);  in watchdog_cdev_unregister()
1022 	mutex_lock(&wd_data->lock);  in watchdog_cdev_unregister()
1023 	wd_data->wdd = NULL;  in watchdog_cdev_unregister()
1024 	wdd->wd_data = NULL;  in watchdog_cdev_unregister()
1025 	mutex_unlock(&wd_data->lock);  in watchdog_cdev_unregister()
1032 	hrtimer_cancel(&wd_data->timer);  in watchdog_cdev_unregister()
1033 	kthread_cancel_work_sync(&wd_data->work);  in watchdog_cdev_unregister()
1035 	kref_put(&wd_data->kref, watchdog_core_data_release);  in watchdog_cdev_unregister()
1124 	device_destroy(&watchdog_class, wdd->wd_data->cdev.dev);  in watchdog_dev_unregister()