linux-kernel - Re: [PATCH v3 1/3] of: Move simple-framebuffer device handling from simplefb to of

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Date:   Tue, 14 Dec 2021 09:37:29 +0100
From:   Javier Martinez Canillas <javier@...hile0.org>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Hector Martin <marcan@...can.st>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Hans de Goede <hdegoede@...hat.com>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Pekka Paalanen <ppaalanen@...il.com>,
        devicetree@...r.kernel.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/3] of: Move simple-framebuffer device handling from
 simplefb to of

On Mon, Dec 13, 2021 at 3:50 PM Rob Herring <robh+dt@...nel.org> wrote:
>
> On Mon, Dec 13, 2021 at 5:30 AM Javier Martinez Canillas
> <javier@...hile0.org> wrote:

[snip]

> >
> > You are right that passing NULL is a safe code path for now due the
> > of_device_is_available(node) check, but that seems fragile to me since
> > just adding a similar debug output to of_platform_device_create()
> > could trigger the NULL pointer dereference.
>
> All/most DT functions work with a NULL node ptr, so why should this
> one be different?
>

If you are OK with the patch as is, then I won't object :)

> Rob

Best regards,
Javier