static int cxl_pci_probe()

in pci.c [474:528]

• 39 lines of code
• 12 McCabe index (conditional complexity)

static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct cxl_register_map map;
	struct cxl_memdev *cxlmd;
	struct cxl_dev_state *cxlds;
	int rc;

	/*
	 * Double check the anonymous union trickery in struct cxl_regs
	 * FIXME switch to struct_group()
	 */
	BUILD_BUG_ON(offsetof(struct cxl_regs, memdev) !=
		     offsetof(struct cxl_regs, device_regs.memdev));

	rc = pcim_enable_device(pdev);
	if (rc)
		return rc;

	cxlds = cxl_dev_state_create(&pdev->dev);
	if (IS_ERR(cxlds))
		return PTR_ERR(cxlds);

	rc = cxl_setup_regs(pdev, CXL_REGLOC_RBI_MEMDEV, &map);
	if (rc)
		return rc;

	rc = cxl_map_regs(cxlds, &map);
	if (rc)
		return rc;

	rc = cxl_pci_setup_mailbox(cxlds);
	if (rc)
		return rc;

	rc = cxl_enumerate_cmds(cxlds);
	if (rc)
		return rc;

	rc = cxl_dev_state_identify(cxlds);
	if (rc)
		return rc;

	rc = cxl_mem_create_range_info(cxlds);
	if (rc)
		return rc;

	cxlmd = devm_cxl_add_memdev(cxlds);
	if (IS_ERR(cxlmd))
		return PTR_ERR(cxlmd);

	if (range_len(&cxlds->pmem_range) && IS_ENABLED(CONFIG_CXL_PMEM))
		rc = devm_cxl_add_nvdimm(&pdev->dev, cxlmd);

	return rc;
}