drm/imx: parallel-display: check return code from of_get_drm_display_mode()

of_get_drm_display_mode() may fail. Check its return code and bail out
on error.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 7b7bb3100831..4abac21c5c9b 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -73,10 +73,16 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
 
         if (np) {
                 struct drm_display_mode *mode = drm_mode_create(connector->dev);
+                int ret;
 
                 if (!mode)
                         return -EINVAL;
-                of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
+
+                ret = of_get_drm_display_mode(np, &imxpd->mode,
+                                              OF_USE_NATIVE_MODE);
+                if (ret)
+                        return ret;
+
                 drm_mode_copy(mode, &imxpd->mode);
                 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
                 drm_mode_probed_add(connector, mode);