drm/modes: Move 3D stereo flag check into drm_mode_validate_basic()

Currently we don't sanity check the 3D stereo flags for modes filled out
by the kernel. Move the check from drm_mode_convert_umode() into
drm_mode_validate_basic() so that we get the same check going both ways.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171114183258.16976-2-ville.syrjala@linux.intel.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 4a3f68a..1a72883 100644 (file)
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1036,6 +1036,9 @@ EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
 enum drm_mode_status
 drm_mode_validate_basic(const struct drm_display_mode *mode)
 {
+       if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
+               return MODE_BAD;
+
        if (mode->clock == 0)
                return MODE_CLOCK_LOW;
 
@@ -1574,9 +1577,6 @@ int drm_mode_convert_umode(struct drm_display_mode *out,
                goto out;
        }
 
-       if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
-               goto out;
-
        out->clock = in->clock;
        out->hdisplay = in->hdisplay;
        out->hsync_start = in->hsync_start;