linux-kernel - Re: [PATCH v4 5/7] drm/panfrost: Add support for multiple power domains

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Message-ID: <CANMq1KBKmOzaF_JcCMz_zWvDdO=ipnr3sv-PvpUZinheKSX8FA@mail.gmail.com>
Date:   Sun, 9 Feb 2020 20:43:35 +0800
From:   Nicolas Boichat <drinkcat@...omium.org>
To:     Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>
Cc:     Rob Herring <robh+dt@...nel.org>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Steven Price <steven.price@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH v4 5/7] drm/panfrost: Add support for multiple power domains

On Fri, Feb 7, 2020 at 9:52 PM Alyssa Rosenzweig
<alyssa.rosenzweig@...labora.com> wrote:
>
> > +     for (i = 0; i < ARRAY_SIZE(pfdev->pm_domain_devs); i++) {
> > +             if (!pfdev->pm_domain_devs[i])
> > +                     break;

(next time, please provide a tiny bit more context when quoting, I had
to look up to see where this comes from)
So this comes from panfrost_pm_domain_fini.

> I'm not totally familiar with this code, but should this be a break or
> just a continue?

Check how the domains are initialized in panfrost_pm_domain_init, they
are guaranteed to be "packed" at the beginning of the array, so there
can't be any holes, so break is safe.