linux-kernel - Re: [PATCH v4 3/7] ACPI: button: Access input device's users under appropriate mutex

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Date:   Thu, 25 Jun 2020 12:55:29 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Andrzej Pietrasiewicz <andrzej.p@...labora.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-iio@...r.kernel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Samsung SoC <linux-samsung-soc@...r.kernel.org>,
        linux-input@...r.kernel.org,
        linux-tegra <linux-tegra@...r.kernel.org>,
        patches@...nsource.cirrus.com,
        ibm-acpi-devel@...ts.sourceforge.net,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Sylvain Lemieux <slemieux.tyco@...il.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Barry Song <baohua@...nel.org>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Nick Dyer <nick@...anahar.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Ferruh Yigit <fery@...ress.com>,
        Sangwon Jee <jeesw@...fas.com>,
        Peter Hutterer <peter.hutterer@...hat.com>,
        Henrique de Moraes Holschuh <ibm-acpi@....eng.br>,
        Collabora Kernel ML <kernel@...labora.com>
Subject: Re: [PATCH v4 3/7] ACPI: button: Access input device's users under
 appropriate mutex

On Thu, Jun 25, 2020 at 7:23 AM Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
>
> On Wed, Jun 24, 2020 at 05:00:09PM +0200, Rafael J. Wysocki wrote:
> > On Mon, Jun 8, 2020 at 1:22 PM Andrzej Pietrasiewicz
> > <andrzej.p@...labora.com> wrote:
> > >
> > > Inspecting input device's 'users' member should be done under device's
> > > mutex, so add appropriate invocations.
> > >
> > > Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
> >
> > This looks like a fix that might be applied independently of the other
> > patches in the series.
> >
> > Do you want me to pick it up?
>
> If you pick it we'll have to have a dance with this series. Can I apply
> instead?

Yes, please.

Also feel free to add

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

to it.

> I do not think this change has any practical effect as nobody
> attaches/detached input handlers or opening/closing input devices when
> system goes through device resume phase.

Indeed.

Thanks!