static int cxl_acpi_cfmws_verify()

in acpi.c [33:73]

• 33 lines of code
• 7 McCabe index (conditional complexity)

static int cxl_acpi_cfmws_verify(struct device *dev,
				 struct acpi_cedt_cfmws *cfmws)
{
	int expected_len;

	if (cfmws->interleave_arithmetic != ACPI_CEDT_CFMWS_ARITHMETIC_MODULO) {
		dev_err(dev, "CFMWS Unsupported Interleave Arithmetic\n");
		return -EINVAL;
	}

	if (!IS_ALIGNED(cfmws->base_hpa, SZ_256M)) {
		dev_err(dev, "CFMWS Base HPA not 256MB aligned\n");
		return -EINVAL;
	}

	if (!IS_ALIGNED(cfmws->window_size, SZ_256M)) {
		dev_err(dev, "CFMWS Window Size not 256MB aligned\n");
		return -EINVAL;
	}

	if (CFMWS_INTERLEAVE_WAYS(cfmws) > CXL_DECODER_MAX_INTERLEAVE) {
		dev_err(dev, "CFMWS Interleave Ways (%d) too large\n",
			CFMWS_INTERLEAVE_WAYS(cfmws));
		return -EINVAL;
	}

	expected_len = struct_size((cfmws), interleave_targets,
				   CFMWS_INTERLEAVE_WAYS(cfmws));

	if (cfmws->header.length < expected_len) {
		dev_err(dev, "CFMWS length %d less than expected %d\n",
			cfmws->header.length, expected_len);
		return -EINVAL;
	}

	if (cfmws->header.length > expected_len)
		dev_dbg(dev, "CFMWS length %d greater than expected %d\n",
			cfmws->header.length, expected_len);

	return 0;
}