drm: Use the driver's gem_object_free function from CMA helpers.

VC4 wraps the CMA objects in its own structures, so it needs to do its
own teardown (waiting for GPU to finish, updating bo_stats tracking).
The other CMA drivers are using drm_gem_cma_free_object as their
gem_free_object, so this should be a no-op for them.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_fb_cma_helper.c

@@ -266,7 +266,7 @@ static int drm_fbdev_cma_create(struct drm_fb_helper *helper,
 	fbi = drm_fb_helper_alloc_fbi(helper);
 	if (IS_ERR(fbi)) {
 		ret = PTR_ERR(fbi);
-		goto err_drm_gem_cma_free_object;
+		goto err_gem_free_object;
 	}
 
 	fbdev_cma->fb = drm_fb_cma_alloc(dev, &mode_cmd, &obj, 1);
@@ -299,8 +299,8 @@ static int drm_fbdev_cma_create(struct drm_fb_helper *helper,
 
 err_fb_info_destroy:
 	drm_fb_helper_release_fbi(helper);
-err_drm_gem_cma_free_object:
-	drm_gem_cma_free_object(&obj->base);
+err_gem_free_object:
+	dev->driver->gem_free_object(&obj->base);
 	return ret;
 }
 

drivers/gpu/drm/drm_gem_cma_helper.c

@@ -121,7 +121,7 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
 	return cma_obj;
 
 error:
-	drm_gem_cma_free_object(&cma_obj->base);
+	drm->driver->gem_free_object(&cma_obj->base);
 	return ERR_PTR(ret);
 }
 EXPORT_SYMBOL_GPL(drm_gem_cma_create);
@@ -171,7 +171,7 @@ drm_gem_cma_create_with_handle(struct drm_file *file_priv,
 	return cma_obj;
 
 err_handle_create:
-	drm_gem_cma_free_object(gem_obj);
+	drm->driver->gem_free_object(gem_obj);
 
 	return ERR_PTR(ret);
 }