drm: Free atomic state during cleanup

The current state of CRTCs, planes and connectors currently leaks during
DRM driver ->unload() unless drivers explicitly clean it up. Since there
is nothing driver-specific about it, that cleanup can be done within the
DRM core.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 589a921..e4e7b92 100644 (file)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -721,6 +721,10 @@ void drm_crtc_cleanup(struct drm_crtc *crtc)
        drm_mode_object_put(dev, &crtc->base);
        list_del(&crtc->head);
        dev->mode_config.num_crtc--;
+
+       WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
+       if (crtc->state && crtc->funcs->atomic_destroy_state)
+               crtc->funcs->atomic_destroy_state(crtc, crtc->state);
 }
 EXPORT_SYMBOL(drm_crtc_cleanup);
 
@@ -918,6 +922,11 @@ void drm_connector_cleanup(struct drm_connector *connector)
        connector->name = NULL;
        list_del(&connector->head);
        dev->mode_config.num_connector--;
+
+       WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
+       if (connector->state && connector->funcs->atomic_destroy_state)
+               connector->funcs->atomic_destroy_state(connector,
+                                                      connector->state);
 }
 EXPORT_SYMBOL(drm_connector_cleanup);
 
@@ -1244,6 +1253,10 @@ void drm_plane_cleanup(struct drm_plane *plane)
        if (plane->type == DRM_PLANE_TYPE_OVERLAY)
                dev->mode_config.num_overlay_plane--;
        drm_modeset_unlock_all(dev);
+
+       WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
+       if (plane->state && plane->funcs->atomic_destroy_state)
+               plane->funcs->atomic_destroy_state(plane, plane->state);
 }
 EXPORT_SYMBOL(drm_plane_cleanup);