bus_print_child_footer
retval += bus_print_child_footer(bus, dev);
bus_print_child_footer(dev, child);
retval += bus_print_child_footer(dev, child);
retval += bus_print_child_footer(dev, child);
retval += bus_print_child_footer(bus, child);
retval += bus_print_child_footer(bus, dev);
retval += bus_print_child_footer(dev, child);
retval += bus_print_child_footer(dev, child);
retval += bus_print_child_footer(dev, child);
retval += bus_print_child_footer(dev, child);
int bus_print_child_footer(device_t dev, device_t child);