static int cxl_acpi_probe()

in acpi.c [377:417]

• 31 lines of code
• 6 McCabe index (conditional complexity)

static int cxl_acpi_probe(struct platform_device *pdev)
{
	int rc;
	struct cxl_port *root_port;
	struct device *host = &pdev->dev;
	struct acpi_device *adev = ACPI_COMPANION(host);
	struct cxl_cfmws_context ctx;

	root_port = devm_cxl_add_port(host, host, CXL_RESOURCE_NONE, NULL);
	if (IS_ERR(root_port))
		return PTR_ERR(root_port);
	dev_dbg(host, "add: %s\n", dev_name(&root_port->dev));

	rc = bus_for_each_dev(adev->dev.bus, NULL, root_port,
			      add_host_bridge_dport);
	if (rc < 0)
		return rc;

	ctx = (struct cxl_cfmws_context) {
		.dev = host,
		.root_port = root_port,
	};
	acpi_table_parse_cedt(ACPI_CEDT_TYPE_CFMWS, cxl_parse_cfmws, &ctx);

	/*
	 * Root level scanned with host-bridge as dports, now scan host-bridges
	 * for their role as CXL uports to their CXL-capable PCIe Root Ports.
	 */
	rc = bus_for_each_dev(adev->dev.bus, NULL, root_port,
			      add_host_bridge_uport);
	if (rc < 0)
		return rc;

	if (IS_ENABLED(CONFIG_CXL_PMEM))
		rc = device_for_each_child(&root_port->dev, root_port,
					   add_root_nvdimm_bridge);
	if (rc < 0)
		return rc;

	return 0;
}