Merge tag 'drm-intel-fixes-2021-12-15' of ssh://git.freedesktop.org/g…

…it/drm/drm-intel into drm-fixes

Fix a bound check in the DMC fw load.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YbnGvnsX/H3rKAqO@intel.com

drivers/gpu/drm/i915/display/intel_dmc.c

@@ -596,7 +596,7 @@ static void parse_dmc_fw(struct drm_i915_private *dev_priv,
 			continue;
 
 		offset = readcount + dmc->dmc_info[id].dmc_offset * 4;
-		if (fw->size - offset < 0) {
+		if (offset > fw->size) {
 			drm_err(&dev_priv->drm, "Reading beyond the fw_size\n");
 			continue;
 		}