void USBAPI(DestroyPort) (UsbPort * port)
{
    if(port->device)
        USBAPI(DestroyDevice)(port->device);
    if(port->hub != NULL)
    {
        UsbPort ** it = &port->hub->ports;
        while((*it) != NULL)
        {
            if((*it) == port)
                *it = (*it)->next;
            else
                it = &(*it)->next;
        }
    }
    free(port);
}