static int switchtec_ntb_add()

in hw/mscc/ntb_hw_switchtec.c [1473:1542]

• 50 lines of code
• 9 McCabe index (conditional complexity)

static int switchtec_ntb_add(struct device *dev,
			     struct class_interface *class_intf)
{
	struct switchtec_dev *stdev = to_stdev(dev);
	struct switchtec_ntb *sndev;
	int rc;

	stdev->sndev = NULL;

	if (stdev->pdev->class != (PCI_CLASS_BRIDGE_OTHER << 8))
		return -ENODEV;

	sndev = kzalloc_node(sizeof(*sndev), GFP_KERNEL, dev_to_node(dev));
	if (!sndev)
		return -ENOMEM;

	sndev->stdev = stdev;
	rc = switchtec_ntb_init_sndev(sndev);
	if (rc)
		goto free_and_exit;

	switchtec_ntb_init_mw(sndev);

	rc = switchtec_ntb_init_req_id_table(sndev);
	if (rc)
		goto free_and_exit;

	rc = switchtec_ntb_init_crosslink(sndev);
	if (rc)
		goto free_and_exit;

	switchtec_ntb_init_db(sndev);
	switchtec_ntb_init_msgs(sndev);

	rc = switchtec_ntb_init_shared_mw(sndev);
	if (rc)
		goto deinit_crosslink;

	rc = switchtec_ntb_init_db_msg_irq(sndev);
	if (rc)
		goto deinit_shared_and_exit;

	/*
	 * If this host crashed, the other host may think the link is
	 * still up. Tell them to force it down (it will go back up
	 * once we register the ntb device).
	 */
	switchtec_ntb_send_msg(sndev, LINK_MESSAGE, MSG_LINK_FORCE_DOWN);

	rc = ntb_register_device(&sndev->ntb);
	if (rc)
		goto deinit_and_exit;

	stdev->sndev = sndev;
	stdev->link_notifier = switchtec_ntb_link_notification;
	dev_info(dev, "NTB device registered\n");

	return 0;

deinit_and_exit:
	switchtec_ntb_deinit_db_msg_irq(sndev);
deinit_shared_and_exit:
	switchtec_ntb_deinit_shared_mw(sndev);
deinit_crosslink:
	switchtec_ntb_deinit_crosslink(sndev);
free_and_exit:
	kfree(sndev);
	dev_err(dev, "failed to register ntb device: %d\n", rc);
	return rc;
}