On Fri, Apr 15, 2016 at 03:10:32PM +1000, Dave Airlie wrote:
> From: Dave Airlie <airlied@xxxxxxxxxx>
>
> This changes the code to handle being called multiple times without
> side effects. The new names seems more suitable for what it does.
>
> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> ---
> drivers/gpu/drm/drm_crtc.c | 37 +++++++++++++++++++++----------------
> drivers/gpu/drm/drm_crtc_internal.h | 4 ++--
> drivers/gpu/drm/drm_modes.c | 2 +-
> 3 files changed, 24 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index e08f962..21cb8dc 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -323,19 +323,24 @@ static void drm_mode_object_register(struct drm_device *dev,
> }
>
> /**
> - * drm_mode_object_put - free a modeset identifer
> + * drm_mode_object_unregister - free a modeset identifer
> * @dev: DRM device
> * @object: object to free
> *
> - * Free @id from @dev's unique identifier pool. Note that despite the _get
> - * postfix modeset identifiers are _not_ reference counted. Hence don't use this
> + * Free @id from @dev's unique identifier pool.
> + * This function can be called multiple times, and guards against
> + * multiple removals.
> + * These modeset identifiers are _not_ reference counted. Hence don't use this
> * for reference counted modeset objects like framebuffers.
> */
> -void drm_mode_object_put(struct drm_device *dev,
> +void drm_mode_object_unregister(struct drm_device *dev,
> struct drm_mode_object *object)
> {
> mutex_lock(&dev->mode_config.idr_mutex);
> - idr_remove(&dev->mode_config.crtc_idr, object->id);
> + if (object->id) {
> + idr_remove(&dev->mode_config.crtc_idr, object->id);
> + object->id = 0;
> + }
> mutex_unlock(&dev->mode_config.idr_mutex);
> }
>
> @@ -705,7 +710,7 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
> drm_num_crtcs(dev));
> }
> if (!crtc->name) {
> - drm_mode_object_put(dev, &crtc->base);
> + drm_mode_object_unregister(dev, &crtc->base);
> return -ENOMEM;
> }
>
> @@ -747,7 +752,7 @@ void drm_crtc_cleanup(struct drm_crtc *crtc)
>
> drm_modeset_lock_fini(&crtc->mutex);
>
> - drm_mode_object_put(dev, &crtc->base);
> + drm_mode_object_unregister(dev, &crtc->base);
> list_del(&crtc->head);
> dev->mode_config.num_crtc--;
>
> @@ -972,7 +977,7 @@ out_put_id:
> ida_remove(&config->connector_ida, connector->connector_id);
> out_put:
> if (ret)
> - drm_mode_object_put(dev, &connector->base);
> + drm_mode_object_unregister(dev, &connector->base);
>
> out_unlock:
> drm_modeset_unlock_all(dev);
> @@ -1010,7 +1015,7 @@ void drm_connector_cleanup(struct drm_connector *connector)
> connector->connector_id);
>
> kfree(connector->display_info.bus_formats);
> - drm_mode_object_put(dev, &connector->base);
> + drm_mode_object_unregister(dev, &connector->base);
> kfree(connector->name);
> connector->name = NULL;
> list_del(&connector->head);
> @@ -1138,7 +1143,7 @@ int drm_encoder_init(struct drm_device *dev,
>
> out_put:
> if (ret)
> - drm_mode_object_put(dev, &encoder->base);
> + drm_mode_object_unregister(dev, &encoder->base);
>
> out_unlock:
> drm_modeset_unlock_all(dev);
> @@ -1181,7 +1186,7 @@ void drm_encoder_cleanup(struct drm_encoder *encoder)
> struct drm_device *dev = encoder->dev;
>
> drm_modeset_lock_all(dev);
> - drm_mode_object_put(dev, &encoder->base);
> + drm_mode_object_unregister(dev, &encoder->base);
> kfree(encoder->name);
> list_del(&encoder->head);
> dev->mode_config.num_encoder--;
> @@ -1242,7 +1247,7 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
> GFP_KERNEL);
> if (!plane->format_types) {
> DRM_DEBUG_KMS("out of memory when allocating plane\n");
> - drm_mode_object_put(dev, &plane->base);
> + drm_mode_object_unregister(dev, &plane->base);
> return -ENOMEM;
> }
>
> @@ -1258,7 +1263,7 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
> }
> if (!plane->name) {
> kfree(plane->format_types);
> - drm_mode_object_put(dev, &plane->base);
> + drm_mode_object_unregister(dev, &plane->base);
> return -ENOMEM;
> }
>
> @@ -1338,7 +1343,7 @@ void drm_plane_cleanup(struct drm_plane *plane)
>
> drm_modeset_lock_all(dev);
> kfree(plane->format_types);
> - drm_mode_object_put(dev, &plane->base);
> + drm_mode_object_unregister(dev, &plane->base);
>
> BUG_ON(list_empty(&plane->head));
>
> @@ -4029,7 +4034,7 @@ void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
>
> if (property->num_values)
> kfree(property->values);
> - drm_mode_object_put(dev, &property->base);
> + drm_mode_object_unregister(dev, &property->base);
> list_del(&property->head);
> kfree(property);
> }
> @@ -4307,7 +4312,7 @@ static void drm_property_free_blob(struct kref *kref)
>
> list_del(&blob->head_global);
> list_del(&blob->head_file);
> - drm_mode_object_put(blob->dev, &blob->base);
> + drm_mode_object_unregister(blob->dev, &blob->base);
>
> kfree(blob);
> }
> diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
> index 247dc8b..a78c138 100644
> --- a/drivers/gpu/drm/drm_crtc_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_internal.h
> @@ -33,8 +33,8 @@
>
> int drm_mode_object_get(struct drm_device *dev,
> struct drm_mode_object *obj, uint32_t obj_type);
> -void drm_mode_object_put(struct drm_device *dev,
> - struct drm_mode_object *object);
> +void drm_mode_object_unregister(struct drm_device *dev,
> + struct drm_mode_object *object);
>
> /* drm_atomic.c */
> int drm_atomic_get_property(struct drm_mode_object *obj,
> diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
> index f7448a5..7def3d5 100644
> --- a/drivers/gpu/drm/drm_modes.c
> +++ b/drivers/gpu/drm/drm_modes.c
> @@ -98,7 +98,7 @@ void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
> if (!mode)
> return;
>
> - drm_mode_object_put(dev, &mode->base);
> + drm_mode_object_unregister(dev, &mode->base);
>
> kfree(mode);
> }
> --
> 2.5.5
>
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> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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