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Subject: Re: [PATCH] cpupower : Handle set and info subcommands for powerpc
To:     Abhishek Goel <huntbag@linux.vnet.ibm.com>,
        linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     trenn@suse.com, shuah <shuah@kernel.org>
References: <20190911095424.49605-1-huntbag@linux.vnet.ibm.com>
From:   shuah <shuah@kernel.org>
Message-ID: <3326dc53-f8a1-dd7b-5ae8-b86ef5ef8b24@kernel.org>
Date:   Wed, 11 Sep 2019 04:11:21 -0600
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On 9/11/19 3:54 AM, Abhishek Goel wrote:
> Cpupower tool has set and info options which are not being used by
> POWER machines. For powerpc, we will return directly for these two
> subcommands. This removes the ambiguous error message while using set
> option in case of power systems.

What is the error message you see? Please include it in the commit log.

> 
> Signed-off-by: Abhishek Goel <huntbag@linux.vnet.ibm.com>
> ---
>   tools/power/cpupower/utils/cpupower-info.c | 5 +++++
>   tools/power/cpupower/utils/cpupower-set.c  | 5 +++++
>   2 files changed, 10 insertions(+)
> 
> diff --git a/tools/power/cpupower/utils/cpupower-info.c b/tools/power/cpupower/utils/cpupower-info.c
> index 4c9d342b70ff..674b707a76af 100644
> --- a/tools/power/cpupower/utils/cpupower-info.c
> +++ b/tools/power/cpupower/utils/cpupower-info.c
> @@ -39,6 +39,11 @@ int cmd_info(int argc, char **argv)
>   	} params = {};
>   	int ret = 0;
>   
> +	#ifdef __powerpc__
> +	printf(_("Cannot read info as system does not support performance bias setting\n"));
> +	return 0;
> +	#endif
> +

I am not in favor of bailing out this early with this ifdef switch.
I would rather see this checked somehow(?) when the ambiguous error
happens.

>   	setlocale(LC_ALL, "");
>   	textdomain(PACKAGE);
>   
> diff --git a/tools/power/cpupower/utils/cpupower-set.c b/tools/power/cpupower/utils/cpupower-set.c
> index 3cd95c6cb974..c95b29278780 100644
> --- a/tools/power/cpupower/utils/cpupower-set.c
> +++ b/tools/power/cpupower/utils/cpupower-set.c
> @@ -41,6 +41,11 @@ int cmd_set(int argc, char **argv)
>   	int perf_bias = 0;
>   	int ret = 0;
>   
> +	#ifdef __powerpc__
> +	printf(_("System does not support performance bias setting\n"));
> +	return 0;
> +	#endif
> +

Same here.

>   	setlocale(LC_ALL, "");
>   	textdomain(PACKAGE);
>   
> 

thanks,
-- Shuah