linux-kernel - Re: [PATCH v2 1/7] selftests: gpio: rework and simplify test implementation

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Message-ID: <CAMpxmJX151+boZkX8SJ7s66GFOfcRvBAvGVTs96Ce2J4ETmFpg@mail.gmail.com>
Date:   Thu, 14 Jan 2021 16:04:23 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Kent Gibson <warthog618@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        linux-kselftest@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Shuah Khan <shuah@...nel.org>,
        Bamvor Jian Zhang <bamv2005@...il.com>
Subject: Re: [PATCH v2 1/7] selftests: gpio: rework and simplify test implementation

On Thu, Jan 7, 2021 at 3:58 AM Kent Gibson <warthog618@...il.com> wrote:
>
> The GPIO mockup selftests are overly complicated with separate
> implementations of the tests for sysfs and cdev uAPI, and with the cdev
> implementation being dependent on tools/gpio and libmount.
>
> Rework the test implementation to provide a common test suite with a
> simplified pluggable uAPI interface.  The cdev implementation utilises
> the GPIO uAPI directly to remove the dependence on tools/gpio.
> The simplified uAPI interface removes the need for any file system mount
> checks in C, and so removes the dependence on libmount.
>
> The rework also fixes the sysfs test implementation which has been broken
> since the device created in the multiple gpiochip case was split into
> separate devices.
>
> Fixes: commit 8a39f597bcfd ("gpio: mockup: rework device probing")
> Signed-off-by: Kent Gibson <warthog618@...il.com>
> Acked-by: Linus Walleij <linus.walleij@...aro.org>


The C part looks good to me. For the shell part I would probably do a
couple things differently but since we don't really have a coding
style for shell scripts in the kernel, I don't want to block these
patches, so:

Reviewed-by: Bartosz Golaszewski <bgolaszewski@...libre.com>