From: Ville Syrjälä ville.syrjala@linux.intel.com
The EDID extension block checksum byte is not part of the actual DispID data, so don't use it in validate_displayid().
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/drm_edid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 3067be710e5b..f1ba06396c0a 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3222,7 +3222,8 @@ static u8 *drm_find_displayid_extension(const struct edid *edid, if (!displayid) return NULL;
- *length = EDID_LENGTH; + /* EDID extensions block checksum isn't for us */ + *length = EDID_LENGTH - 1; *idx = 1;
ret = validate_displayid(displayid, *length, *idx);