static int __init mvebu_odmi_init()

in irq-mvebu-odmi.c [161:233]

• 60 lines of code
• 13 McCabe index (conditional complexity)

static int __init mvebu_odmi_init(struct device_node *node,
				  struct device_node *parent)
{
	struct irq_domain *inner_domain, *plat_domain;
	int ret, i;

	if (of_property_read_u32(node, "marvell,odmi-frames", &odmis_count))
		return -EINVAL;

	odmis = kcalloc(odmis_count, sizeof(struct odmi_data), GFP_KERNEL);
	if (!odmis)
		return -ENOMEM;

	odmis_bm = bitmap_zalloc(odmis_count * NODMIS_PER_FRAME, GFP_KERNEL);
	if (!odmis_bm) {
		ret = -ENOMEM;
		goto err_alloc;
	}

	for (i = 0; i < odmis_count; i++) {
		struct odmi_data *odmi = &odmis[i];

		ret = of_address_to_resource(node, i, &odmi->res);
		if (ret)
			goto err_unmap;

		odmi->base = of_io_request_and_map(node, i, "odmi");
		if (IS_ERR(odmi->base)) {
			ret = PTR_ERR(odmi->base);
			goto err_unmap;
		}

		if (of_property_read_u32_index(node, "marvell,spi-base",
					       i, &odmi->spi_base)) {
			ret = -EINVAL;
			goto err_unmap;
		}
	}

	inner_domain = irq_domain_create_linear(of_node_to_fwnode(node),
						odmis_count * NODMIS_PER_FRAME,
						&odmi_domain_ops, NULL);
	if (!inner_domain) {
		ret = -ENOMEM;
		goto err_unmap;
	}

	inner_domain->parent = irq_find_host(parent);

	plat_domain = platform_msi_create_irq_domain(of_node_to_fwnode(node),
						     &odmi_msi_domain_info,
						     inner_domain);
	if (!plat_domain) {
		ret = -ENOMEM;
		goto err_remove_inner;
	}

	return 0;

err_remove_inner:
	irq_domain_remove(inner_domain);
err_unmap:
	for (i = 0; i < odmis_count; i++) {
		struct odmi_data *odmi = &odmis[i];

		if (odmi->base && !IS_ERR(odmi->base))
			iounmap(odmis[i].base);
	}
	bitmap_free(odmis_bm);
err_alloc:
	kfree(odmis);
	return ret;
}