linux-kernel - Re: [PATCH v3 02/29] selftests/resctrl: Return -1 instead of errno on error

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Date:   Wed, 13 Dec 2023 13:54:21 -0800
From:   Reinette Chatre <reinette.chatre@...el.com>
To:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        <linux-kselftest@...r.kernel.org>, Shuah Khan <shuah@...nel.org>,
        "Shaopeng Tan" <tan.shaopeng@...fujitsu.com>,
        Maciej Wieczór-Retman 
        <maciej.wieczor-retman@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>
CC:     <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 02/29] selftests/resctrl: Return -1 instead of errno on
 error

Hi Ilpo,

On 12/11/2023 4:17 AM, Ilpo Järvinen wrote:
> A number of functions in the resctrl selftests return errno. It is
> problematic because errno is positive which is often counterintuitive.
> Also, every sites returning errno prints the error message already with

every sites -> every site

> ksft_perror() so there is not much added value in returning the precise
> error code.
> 
> Simply convert all places returning errno to return -1 that is typical
> userspace error code in case of failures.
> 
> While at it, improve resctrl_val() comment to state that 0 means the
> test was run (either pass or fail).
> 
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> ---

Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>

Reinette