PCI_DVSEC_HEADER1
pci_read_config_dword(pdev, regloc + PCI_DVSEC_HEADER1, ®loc_size);
pci_read_config_word(dev, pos + PCI_DVSEC_HEADER1, &v);
hdr = readl(dvsec + PCI_DVSEC_HEADER1);
pci_read_config_dword(pdev, pos + PCI_DVSEC_HEADER1, &hdr);
ret = pci_read_config_dword(pdev, epos + PCI_DVSEC_HEADER1, &dword);