230 	int retval;  in adu_open()  local
234 	retval = mutex_lock_interruptible(&adutux_mutex);  in adu_open()
235 	if (retval)  in adu_open()
242 		retval = -ENODEV;  in adu_open()
248 		retval = -ENODEV;  in adu_open()
254 		retval = -EBUSY;  in adu_open()
285 	retval = 0;  in adu_open()
290 	return retval;  in adu_open()
308 	int retval = 0;  in adu_release()  local
311 		retval = -ENODEV;  in adu_release()
317 		retval = -ENODEV;  in adu_release()
325 		retval = -ENODEV;  in adu_release()
338 	return retval;  in adu_release()
348 	int retval = 0;  in adu_read()  local
360 		retval = -ENODEV;  in adu_read()
361 		pr_err("No device or device unplugged %d\n", retval);  in adu_read()
386 				retval = -EFAULT;  in adu_read()
393 				retval = bytes_read ? bytes_read : -EFAULT;  in adu_read()
438 					retval = usb_submit_urb(dev->interrupt_in_urb, GFP_KERNEL);  in adu_read()
439 					if (retval) {  in adu_read()
441 						if (retval == -ENOMEM) {  in adu_read()
442 							retval = bytes_read ? bytes_read : -ENOMEM;  in adu_read()
467 					retval = bytes_read ? bytes_read : -ETIMEDOUT;  in adu_read()
475 					retval = bytes_read ? bytes_read : -EINTR;  in adu_read()
482 	retval = bytes_read;  in adu_read()
507 	return retval;  in adu_read()
519 	int retval;  in adu_write()  local
523 	retval = mutex_lock_interruptible(&dev->mtx);  in adu_write()
524 	if (retval)  in adu_write()
529 		retval = -ENODEV;  in adu_write()
530 		pr_err("No device or device unplugged %d\n", retval);  in adu_write()
553 				retval = -EINTR;  in adu_write()
559 				retval = -ETIMEDOUT;  in adu_write()
563 			retval = mutex_lock_interruptible(&dev->mtx);  in adu_write()
564 			if (retval) {  in adu_write()
565 				retval = bytes_written ? bytes_written : retval;  in adu_write()
587 				retval = -EFAULT;  in adu_write()
603 			retval = usb_submit_urb(dev->interrupt_out_urb, GFP_KERNEL);  in adu_write()
604 			if (retval < 0) {  in adu_write()
607 					"interrupt_out_urb %d\n", retval);  in adu_write()
623 	return retval;  in adu_write()
627 	return retval;  in adu_write()
663 	int retval = -ENODEV;  in adu_probe()  local
677 		retval = -ENOMEM;  in adu_probe()
714 		retval = -ENOMEM;  in adu_probe()
727 		retval = -ENOMEM;  in adu_probe()
772 	retval = usb_register_dev(interface, &adu_class);  in adu_probe()
774 	if (retval) {  in adu_probe()
788 	return retval;  in adu_probe()
792 	return retval;  in adu_probe()