simple_io
retval = simple_io(tdev, urb, 1, 0, 0, __func__);
retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
retval = simple_io(tdev, urb, 1, 0, 0, __func__);
retval = simple_io(tdev, urb, 1, 0, 0, __func__);
retval = simple_io(tdev, urb, iterations, 0, 0, label);
retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
retval = simple_io(dev, urb, param->iterations, param->vary,
retval = simple_io(dev, urb, param->iterations, param->vary,
retval = simple_io(dev, urb, param->iterations, 0, 0, "test25");
retval = simple_io(dev, urb, param->iterations, 0, 0, "test26");