drm/bridge_connector: Handle drm_connector_init_with_ddc() failures

drm_connector_init_with_ddc() can fail, but the call in
drm_bridge_connector_init() does not check that. Fix this by adding
the missing error handling.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Reviewed-by: Maxime Ripard <[e-mail]>
Signed-off-by: Javier Martinez Canillas <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/3a7e9[e-mail]

drivers/gpu/drm/drm_bridge_connector.c

···
 	struct i2c_adapter *ddc = NULL;
 	struct drm_bridge *bridge, *panel_bridge = NULL;
 	int connector_type;
+	int ret;
 
 	bridge_connector = kzalloc(sizeof(*bridge_connector), GFP_KERNEL);
 	if (!bridge_connector)
···
 		return ERR_PTR(-EINVAL);
 	}
 
-	drm_connector_init_with_ddc(drm, connector, &drm_bridge_connector_funcs,
-				    connector_type, ddc);
+	ret = drm_connector_init_with_ddc(drm, connector,
+					  &drm_bridge_connector_funcs,
+					  connector_type, ddc);
+	if (ret) {
+		kfree(bridge_connector);
+		return ERR_PTR(ret);
+	}
+
 	drm_connector_helper_add(connector, &drm_bridge_connector_helper_funcs);
 
 	if (bridge_connector->bridge_hpd)