linux-kernel - Re: [PATCH v1] drm/modes: Skip invalid cmdline mode

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Message-ID: <20190710101229.54ufuhmh22dfxclr@flea>
Date:   Wed, 10 Jul 2019 12:12:29 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <sean@...rly.run>, Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] drm/modes: Skip invalid cmdline mode

On Tue, Jul 09, 2019 at 05:51:51PM +0300, Dmitry Osipenko wrote:
> The named mode could be invalid and then cmdline parser misses to validate
> mode's dimensions, happily adding 0x0 mode as a valid mode. One case where
> this happens is NVIDIA Tegra devices that are using downstream bootloader
> which adds "video=tegrafb" to the kernel's cmdline and thus upstream Tegra
> DRM driver fails to probe because of the invalid mode.
>
> Fixes: 3aeeb13d8996 ("drm/modes: Support modes names on the command line")
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>

Applied to drm-misc-next-fixes

Thanks for figuring this out!

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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