usbip_recv
ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
EXPORT_SYMBOL_GPL(usbip_recv);
ret = usbip_recv(ud->tcp_socket, buff, size);
recv = usbip_recv(ud->tcp_socket, sg_virt(sg),
ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
int usbip_recv(struct socket *sock, void *buf, int size);
ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));