static int hisi_lpc_acpi_probe()

in hisi_lpc.c [502:593]

• 76 lines of code
• 10 McCabe index (conditional complexity)

static int hisi_lpc_acpi_probe(struct device *hostdev)
{
	struct acpi_device *adev = ACPI_COMPANION(hostdev);
	struct acpi_device *child;
	int ret;

	/* Only consider the children of the host */
	list_for_each_entry(child, &adev->children, node) {
		const char *hid = acpi_device_hid(child);
		const struct hisi_lpc_acpi_cell *cell;
		struct platform_device *pdev;
		const struct resource *res;
		bool found = false;
		int num_res;

		ret = hisi_lpc_acpi_set_io_res(&child->dev, &adev->dev, &res,
					       &num_res);
		if (ret) {
			dev_warn(hostdev, "set resource fail (%d)\n", ret);
			goto fail;
		}

		cell = (struct hisi_lpc_acpi_cell []){
			/* ipmi */
			{
				.hid = "IPI0001",
				.name = "hisi-lpc-ipmi",
			},
			/* 8250-compatible uart */
			{
				.hid = "HISI1031",
				.name = "serial8250",
				.pdata = (struct plat_serial8250_port []) {
					{
						.iobase = res->start,
						.uartclk = 1843200,
						.iotype = UPIO_PORT,
						.flags = UPF_BOOT_AUTOCONF,
					},
					{}
				},
				.pdata_size = 2 *
					sizeof(struct plat_serial8250_port),
			},
			{}
		};

		for (; cell && cell->name; cell++) {
			if (!strcmp(cell->hid, hid)) {
				found = true;
				break;
			}
		}

		if (!found) {
			dev_warn(hostdev,
				 "could not find cell for child device (%s), discarding\n",
				 hid);
			continue;
		}

		pdev = platform_device_alloc(cell->name, PLATFORM_DEVID_AUTO);
		if (!pdev) {
			ret = -ENOMEM;
			goto fail;
		}

		pdev->dev.parent = hostdev;
		ACPI_COMPANION_SET(&pdev->dev, child);

		ret = platform_device_add_resources(pdev, res, num_res);
		if (ret)
			goto fail;

		ret = platform_device_add_data(pdev, cell->pdata,
					       cell->pdata_size);
		if (ret)
			goto fail;

		ret = platform_device_add(pdev);
		if (ret)
			goto fail;

		acpi_device_set_enumerated(child);
	}

	return 0;

fail:
	hisi_lpc_acpi_remove(hostdev);
	return ret;
}