PCI_CAP_ID_INVALID_VIRT
BUILD_BUG_ON(PCI_CAP_ID_MAX >= PCI_CAP_ID_INVALID_VIRT);
BUILD_BUG_ON(PCI_EXT_CAP_ID_MAX >= PCI_CAP_ID_INVALID_VIRT);
} else if (cap_id == PCI_CAP_ID_INVALID_VIRT) {
PCI_CAP_ID_INVALID_VIRT, 4);