Merge tag 'topic/drm-misc-2016-05-18' of git://anongit.freedesktop.org/drm-intel into drm-next

Update drm-misc pull with a few more fixes included, plus the two from
Arnd for the fallout from the drm_gem_object_lookup() refactor that I
failed to spot :(

* tag 'topic/drm-misc-2016-05-18' of git://anongit.freedesktop.org/drm-intel:
  drm: remove unused dev variables
  drm: mediatek: fixup drm_gem_object_lookup API change
  drm/tegra: Fix crash caused by reference count imbalance
  drm: Fix error handling in drm_connector_register
  drm: Avoid connector reference imbalance on error path
  drm/fb_helper: Fix references to dev->mode_config.num_connector
  drm/i915/fbdev: Fix num_connector references in intel_fb_initial_config()
  qxl: catch qxlfb_create_pinned_object failures
  drm/exynos/hdmi: add a missing tab
  drm/fb-cma-helper: Add function drm_fb_cma_create_with_funcs()
  drm/fb-cma-helper: Use const for drm_framebuffer_funcs argument
  drm: Drop connector argument from __drm_atomic_helper_connector_destroy_state
  drm: Drop plane argument from __drm_atomic_helper_plane_destroy_state
  drm: Drop crtc argument from __drm_atomic_helper_crtc_destroy_state
  drm: Remove unused drm_device from drm_gem_object_lookup()

1 files changed, 11 insertions, 9 deletions

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 86e89db02ed7..3ff1ed7b33db 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1160,14 +1160,18 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
 {
 	struct drm_crtc_state *crtc_state;
 
-	if (crtc)
-		drm_connector_reference(conn_state->connector);
-	if (conn_state->crtc && conn_state->crtc != crtc) {
+	if (conn_state->crtc == crtc)
+		return 0;
+
+	if (conn_state->crtc) {
 		crtc_state = drm_atomic_get_existing_crtc_state(conn_state->state,
 								conn_state->crtc);
 
 		crtc_state->connector_mask &=
 			~(1 << drm_connector_index(conn_state->connector));
+
+		drm_connector_unreference(conn_state->connector);
+		conn_state->crtc = NULL;
 	}
 
 	if (crtc) {
@@ -1177,18 +1181,16 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
 
 		crtc_state->connector_mask |=
 			1 << drm_connector_index(conn_state->connector);
-	}
 
-	if (conn_state->crtc)
-		drm_connector_unreference(conn_state->connector);
-	conn_state->crtc = crtc;
+		drm_connector_reference(conn_state->connector);
+		conn_state->crtc = crtc;
 
-	if (crtc)
 		DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
 				 conn_state, crtc->base.id, crtc->name);
-	else
+	} else {
 		DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
 				 conn_state);
+	}
 
 	return 0;
 }