linux-kernel - Re: [PATCH] drivers: gpio: add virtio-gpio guest driver

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Date:   Wed, 16 Jun 2021 10:31:00 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Viresh Kumar <viresh.kumar@...aro.org>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        virtualization@...ts.linux-foundation.org,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH] drivers: gpio: add virtio-gpio guest driver

Hi Enrico,

On Tue, Jun 15, 2021 at 7:49 PM Enrico Weigelt, metux IT consult
<info@...ux.net> wrote:

> Introduce new GPIO driver for virtual GPIO devices via virtio.
>
> The driver implements the virtio-gpio protocol (ID 41), which can be
> used by either VM guests (e.g. bridging virtual gpios from the guest
> to real gpios in the host or attaching simulators for automatic
> application testing), as well as virtio-gpio hardware devices.
>
> Signed-off-by: Enrico Weigelt, metux IT consult <info@...ux.net>

So now there are two contesting patches for this and that creates a
social problem for us as maintainers. I am not too happy about that.

This situation activates the kernel management style document so
I advise involved parties to familiarize themselves with it:
https://www.kernel.org/doc/html/latest/process/management-style.html

Can we get the discussion down to actual technical points?
We really need a virtio GPIO driver, no doubt, so if everyone could
just work toward that goal and compromise with their specific pet
peeves that would be great.

Yours,
Linus Walleij