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| author | Dmitry Osipenko <digetx@gmail.com> | 2019-07-09 17:51:51 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2019-07-10 12:11:18 +0200 |
| commit | 7f3bbc0b817b51206948b743331c7441bf918c7f (patch) | |
| tree | b0ea63b72fd0b2640ec11141cafb364a8dd9d798 /drivers/gpu/drm/drm_modes.c | |
| parent | 990dee3aa45690217e8d83e7704cf07b2f3d9821 (diff) | |
| download | linux-7f3bbc0b817b51206948b743331c7441bf918c7f.tar.bz2 | |
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: 3aeeb13d8996 ("drm/modes: Support modes names on the command line")
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190709145151.23086-1-digetx@gmail.com
Diffstat (limited to 'drivers/gpu/drm/drm_modes.c')
| -rw-r--r-- | drivers/gpu/drm/drm_modes.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 910561d4f071..74a5739df506 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -158,6 +158,9 @@ struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, int interlace; u64 tmp; + if (!hdisplay || !vdisplay) + return NULL; + /* allocate the drm_display_mode structure. If failure, we will * return directly */ @@ -392,6 +395,9 @@ drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, int hsync, hfront_porch, vodd_front_porch_lines; unsigned int tmp1, tmp2; + if (!hdisplay || !vdisplay) + return NULL; + drm_mode = drm_mode_create(dev); if (!drm_mode) return NULL; |