318 	int retval = 0;  in tower_open()  local
330 		retval = -ENODEV;  in tower_open()
339 		retval = -ENODEV;  in tower_open()
346 	        retval = -ERESTARTSYS;  in tower_open()
354 		retval = -EBUSY;  in tower_open()
373 		retval = result;  in tower_open()
393 	retval = usb_submit_urb (dev->interrupt_in_urb, GFP_KERNEL);  in tower_open()
394 	if (retval) {  in tower_open()
396 			"Couldn't submit interrupt_in_urb %d\n", retval);  in tower_open()
409 	return retval;  in tower_open()
418 	int retval = 0;  in tower_release()  local
423 		retval = -ENODEV;  in tower_release()
429 	        retval = -ERESTARTSYS;  in tower_release()
436 		retval = -ENODEV;  in tower_release()
461 	return retval;  in tower_release()
552 	int retval = 0;  in tower_read()  local
559 		retval = -ERESTARTSYS;  in tower_read()
565 		retval = -ENODEV;  in tower_read()
566 		pr_err("No device or device unplugged %d\n", retval);  in tower_read()
584 			retval = -EAGAIN;  in tower_read()
587 …retval = wait_event_interruptible_timeout(dev->read_wait, dev->interrupt_in_done, dev->packet_time…  in tower_read()
588 		if (retval < 0) {  in tower_read()
599 			retval = -ETIMEDOUT;  in tower_read()
609 		retval = -EFAULT;  in tower_read()
621 	retval = bytes_to_read;  in tower_read()
628 	return retval;  in tower_read()
639 	int retval = 0;  in tower_write()  local
645 		retval = -ERESTARTSYS;  in tower_write()
651 		retval = -ENODEV;  in tower_write()
652 		pr_err("No device or device unplugged %d\n", retval);  in tower_write()
665 			retval = -EAGAIN;  in tower_write()
668 		retval = wait_event_interruptible (dev->write_wait, !dev->interrupt_out_busy);  in tower_write()
669 		if (retval) {  in tower_write()
680 		retval = -EFAULT;  in tower_write()
697 	retval = usb_submit_urb (dev->interrupt_out_urb, GFP_KERNEL);  in tower_write()
698 	if (retval) {  in tower_write()
701 			"Couldn't submit interrupt_out_urb %d\n", retval);  in tower_write()
704 	retval = bytes_to_write;  in tower_write()
711 	return retval;  in tower_write()
722 	int retval;  in tower_interrupt_in_callback()  local
760 		retval = usb_submit_urb (dev->interrupt_in_urb, GFP_ATOMIC);  in tower_interrupt_in_callback()
761 		if (retval)  in tower_interrupt_in_callback()
764 				__func__, retval);  in tower_interrupt_in_callback()
813 	int retval = -ENOMEM;  in tower_probe()  local
904 	retval = usb_register_dev (interface, &tower_class);  in tower_probe()
906 	if (retval) {  in tower_probe()
931 		retval = result;  in tower_probe()
941 	return retval;  in tower_probe()
945 	return retval;  in tower_probe()