If the device tree property fsl,panel is missing, drm_panel_attach is called with a NULL pointer as first argument. Having a panel is basically mandatory since RGB is the only supported connector. Check if a panel node has been found, return -ENODEV and cleanup otherwise.
Signed-off-by: Stefan Agner stefan@agner.ch --- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c index a07886f..819fe12 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c @@ -171,14 +171,18 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev, DRM_MODE_DPMS_OFF);
panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0); - if (panel_node) { - fsl_dev->connector.panel = of_drm_find_panel(panel_node); - if (!fsl_dev->connector.panel) { - ret = -EPROBE_DEFER; - goto err_sysfs; - } - of_node_put(panel_node); + if (!panel_node) { + dev_err(fsl_dev->dev, "fsl,panel property not found\n"); + ret = -ENODEV; + goto err_sysfs; + } + + fsl_dev->connector.panel = of_drm_find_panel(panel_node); + if (!fsl_dev->connector.panel) { + ret = -EPROBE_DEFER; + goto err_panel; } + of_node_put(panel_node);
ret = drm_panel_attach(fsl_dev->connector.panel, connector); if (ret) { @@ -188,6 +192,8 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
return 0;
+err_panel: + of_node_put(panel_node); err_sysfs: drm_connector_unregister(connector); err_cleanup: