drm/modes: Skip invalid cmdline mode
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: 3aeeb13d ("drm/modes: Support modes names on the command line") Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: NDmitry Osipenko <digetx@gmail.com> Signed-off-by: NMaxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190709145151.23086-1-digetx@gmail.com
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