295 	struct watchdog_device *wdd = file->private_data;  in watchdog_write()  local
306 	clear_bit(WDOG_ALLOW_RELEASE, &wdd->status);  in watchdog_write()
313 			set_bit(WDOG_ALLOW_RELEASE, &wdd->status);  in watchdog_write()
317 	watchdog_ping(wdd);  in watchdog_write()
335 	struct watchdog_device *wdd = file->private_data;  in watchdog_ioctl()  local
341 	err = watchdog_ioctl_op(wdd, cmd, arg);  in watchdog_ioctl()
347 		return copy_to_user(argp, wdd->info,  in watchdog_ioctl()
350 		err = watchdog_get_status(wdd, &val);  in watchdog_ioctl()
355 		return put_user(wdd->bootstatus, p);  in watchdog_ioctl()
360 			err = watchdog_stop(wdd);  in watchdog_ioctl()
365 			err = watchdog_start(wdd);  in watchdog_ioctl()
371 		if (!(wdd->info->options & WDIOF_KEEPALIVEPING))  in watchdog_ioctl()
373 		watchdog_ping(wdd);  in watchdog_ioctl()
378 		err = watchdog_set_timeout(wdd, val);  in watchdog_ioctl()
384 		watchdog_ping(wdd);  in watchdog_ioctl()
388 		if (wdd->timeout == 0)  in watchdog_ioctl()
390 		return put_user(wdd->timeout, p);  in watchdog_ioctl()
392 		err = watchdog_get_timeleft(wdd, &val);  in watchdog_ioctl()
414 	struct watchdog_device *wdd;  in watchdog_open()  local
418 		wdd = old_wdd;  in watchdog_open()
420 		wdd = container_of(inode->i_cdev, struct watchdog_device, cdev);  in watchdog_open()
423 	if (test_and_set_bit(WDOG_DEV_OPEN, &wdd->status))  in watchdog_open()
430 	if (!try_module_get(wdd->ops->owner))  in watchdog_open()
433 	err = watchdog_start(wdd);  in watchdog_open()
437 	file->private_data = wdd;  in watchdog_open()
439 	if (wdd->ops->ref)  in watchdog_open()
440 		wdd->ops->ref(wdd);  in watchdog_open()
446 	module_put(wdd->ops->owner);  in watchdog_open()
448 	clear_bit(WDOG_DEV_OPEN, &wdd->status);  in watchdog_open()
464 	struct watchdog_device *wdd = file->private_data;  in watchdog_release()  local
472 	if (!test_bit(WDOG_ACTIVE, &wdd->status))  in watchdog_release()
474 	else if (test_and_clear_bit(WDOG_ALLOW_RELEASE, &wdd->status) ||  in watchdog_release()
475 		 !(wdd->info->options & WDIOF_MAGICCLOSE))  in watchdog_release()
476 		err = watchdog_stop(wdd);  in watchdog_release()
480 		mutex_lock(&wdd->lock);  in watchdog_release()
481 		if (!test_bit(WDOG_UNREGISTERED, &wdd->status))  in watchdog_release()
482 			dev_crit(wdd->dev, "watchdog did not stop!\n");  in watchdog_release()
483 		mutex_unlock(&wdd->lock);  in watchdog_release()
484 		watchdog_ping(wdd);  in watchdog_release()
488 	module_put(wdd->ops->owner);  in watchdog_release()
491 	clear_bit(WDOG_DEV_OPEN, &wdd->status);  in watchdog_release()
494 	if (wdd->ops->unref)  in watchdog_release()
495 		wdd->ops->unref(wdd);  in watchdog_release()