diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 616191fe98aec19781633a762c6f6cd7e707c1e0..d997a6014d6c2a27342819ac5b2d91f7ab52f094 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -860,13 +860,13 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev,
 
 	plane = devm_kzalloc(dev, sizeof(*plane), GFP_KERNEL);
 	if (!plane)
-		return 0;
+		return NULL;
 
 	ret = drm_universal_plane_init(ddev, plane, possible_crtcs,
 				       &ltdc_plane_funcs, formats, nb_fmt,
 				       NULL, type, NULL);
 	if (ret < 0)
-		return 0;
+		return NULL;
 
 	drm_plane_helper_add(plane, &ltdc_plane_helper_funcs);