drm/imx: imx-ldb: check return code on panel attach

Check the return code on panel attach. Avoids a kernel crash later
on if the attach failed.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index 00d67b5407d8..5d2831dfb8b9 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -474,8 +474,12 @@ static int imx_ldb_register(struct drm_device *drm,
         drm_connector_init(drm, &imx_ldb_ch->connector,
                            &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
 
-        if (imx_ldb_ch->panel)
-                drm_panel_attach(imx_ldb_ch->panel, &imx_ldb_ch->connector);
+        if (imx_ldb_ch->panel) {
+                ret = drm_panel_attach(imx_ldb_ch->panel,
+                                       &imx_ldb_ch->connector);
+                if (ret)
+                        return ret;
+        }
 
         drm_mode_connector_attach_encoder(&imx_ldb_ch->connector, encoder);