RES_DEV_ID
res[RES_DEV_ID].start = pci_resource_start(pdev, PCI_BAR_DEV);
res[RES_DEV_ID].end = pci_resource_end(pdev, PCI_BAR_DEV);
res[RES_DEV_ID].name = "dev";
res[RES_DEV_ID].flags = IORESOURCE_MEM;
&res[RES_DEV_ID].start);