static int rapl_check_domain()

in intel_rapl_common.c [1225:1250]

• 20 lines of code
• 8 McCabe index (conditional complexity)

static int rapl_check_domain(int cpu, int domain, struct rapl_package *rp)
{
	struct reg_action ra;

	switch (domain) {
	case RAPL_DOMAIN_PACKAGE:
	case RAPL_DOMAIN_PP0:
	case RAPL_DOMAIN_PP1:
	case RAPL_DOMAIN_DRAM:
	case RAPL_DOMAIN_PLATFORM:
		ra.reg = rp->priv->regs[domain][RAPL_DOMAIN_REG_STATUS];
		break;
	default:
		pr_err("invalid domain id %d\n", domain);
		return -EINVAL;
	}
	/* make sure domain counters are available and contains non-zero
	 * values, otherwise skip it.
	 */

	ra.mask = ENERGY_STATUS_MASK;
	if (rp->priv->read_raw(cpu, &ra) || !ra.value)
		return -ENODEV;

	return 0;
}