URB_SETUP_MAP_SINGLE
(urb->transfer_flags & URB_SETUP_MAP_SINGLE))
urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL);
urb->transfer_flags |= URB_SETUP_MAP_SINGLE;
if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |
URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL |
{URB_SETUP_MAP_SINGLE, USBIP_URB_SETUP_MAP_SINGLE},