drm/i915: Handle error to get connector state when staging config

The return value of one of the calls to drm_atomic_get_connector_state()
in intel_modeset_stage_output_state() wasn't checked for errors.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3852cba..75955fe 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11985,6 +11985,8 @@ intel_modeset_stage_output_state(struct drm_device *dev,
        for_each_intel_connector(dev, connector) {
                connector_state =
                        drm_atomic_get_connector_state(state, &connector->base);
+               if (IS_ERR(connector_state))
+                       return PTR_ERR(connector_state);
 
                if (connector->new_encoder) {
                        if (connector->new_encoder != connector->encoder)