[Intel-gfx] drm/i915: Copy the staged connector config to the legacy atomic state

[Dan Carpenter]

Hello Ander Conselvan de Oliveira,

The patch 944b0c765757: "drm/i915: Copy the staged connector config
to the legacy atomic state" from Mar 20, 2015, leads to the following
Smatch warning:

	drivers/gpu/drm/i915/intel_display.c:11937 intel_modeset_stage_output_state()
	error: 'connector_state' dereferencing possible ERR_PTR()

drivers/gpu/drm/i915/intel_display.c
 11928          /* Now we've also updated encoder->new_crtc for all encoders. */
 11929          for_each_intel_connector(dev, connector) {
 11930                  connector_state =
 11931                          drm_atomic_get_connector_state(state, &connector->base);
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
It's complaining that this can return an ERR_PTR.

 11932  
 11933                  if (connector->new_encoder) {
 11934                          if (connector->new_encoder != connector->encoder)
 11935                                  connector->encoder = connector->new_encoder;
 11936                  } else {
 11937                          connector_state->crtc = NULL;
 11938                  }
 11939          }


regards,
dan carpenter