Re: [PATCH 1/1] cpufreq: intel_pstate: skip the driver if ACPI has power mgmt option

[Dirk Brandewie <dirk.brandewie@xxxxxxxxx>]

On 10/20/2013 10:27 PM, Adrian Huang wrote:
>   static int __init intel_pstate_init(void)
>   {
>   	int cpu, rc = 0;
> @@ -708,6 +779,15 @@ static int __init intel_pstate_init(void)
>   	if (no_load)
>   		return -ENODEV;
>
> +	if (!acpi_disabled) {
> +		/*
> +		 * Check if the platform has its own power management modes.
> +		 * If so, the pstate cpufreq driver will be ignored.
> +		 */
> +		if (intel_pstate_platform_pwr_mgmt_exists())
> +			return 0;

Please return -ENODEV here instead of 0

> +	}
> +
>   	id = x86_match_cpu(intel_pstate_cpu_ids);
>   	if (!id)
>   		return -ENODEV;

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