EXTCONF_IS_VALID
EXTCONF_IS_VALID(mb, dev, func) ? 'Y' : 'N');
if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE) {
if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE)
if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE)