linux-kernel - Re: [PATCH v3 3/8] media: v4l2-core: ignore native command codes

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Message-ID: <CAK8P3a1t9kWcSVDyb-a3CWXgukLGVV9orRj58LbsGgCM3Z01JQ@mail.gmail.com>
Date:   Wed, 6 Nov 2019 21:18:58 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Linux Media Mailing List <linux-media@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        y2038 Mailman List <y2038@...ts.linaro.org>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Tiffany Lin <tiffany.lin@...iatek.com>,
        Daniel Mentz <danielmentz@...gle.com>,
        "# 3.4.x" <stable@...r.kernel.org>
Subject: Re: [PATCH v3 3/8] media: v4l2-core: ignore native command codes

On Wed, Nov 6, 2019 at 8:47 PM Arnd Bergmann <arnd@...db.de> wrote:
>
> The do_video_ioctl() compat handler converts the compat command
> codes into the native ones before processing further, but this
> causes problems for 32-bit user applications that pass a command
> code that matches a 64-bit native number, which will then be
> handled the same way.

I noticed that a change to the subject line made this one less
obvious, I've changed it to "media: v4l2-core: compat: ignore native
command codes" in my tree now.

       Arnd