drm: Destroy property blobs at mode config cleanup time
authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Mon, 15 Apr 2013 13:37:16 +0000 (15:37 +0200)
committerDave Airlie <airlied@redhat.com>
Tue, 16 Apr 2013 03:11:44 +0000 (13:11 +1000)
Property blob objects need to be destroyed when cleaning up to avoid
memory leaks. Go through the list of all blobs in the
drm_mode_config_cleanup() function and destroy them.

The drm_mode_config_cleanup() function needs to be moved after the
drm_property_destroy_blob() declaration. Move drm_mode_config_init() as
well to keep the functions together.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/drm_crtc.c

index a3b63cf31eebbc2dc0deb5bbb2d1f2f2f3bc37e9..957fb70e8d0e41b16d7d078fbed5b9cff57363e6 100644 (file)
@@ -1120,44 +1120,6 @@ int drm_mode_create_dirty_info_property(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
 
-/**
- * drm_mode_config_init - initialize DRM mode_configuration structure
- * @dev: DRM device
- *
- * Initialize @dev's mode_config structure, used for tracking the graphics
- * configuration of @dev.
- *
- * Since this initializes the modeset locks, no locking is possible. Which is no
- * problem, since this should happen single threaded at init time. It is the
- * driver's problem to ensure this guarantee.
- *
- */
-void drm_mode_config_init(struct drm_device *dev)
-{
-       mutex_init(&dev->mode_config.mutex);
-       mutex_init(&dev->mode_config.idr_mutex);
-       mutex_init(&dev->mode_config.fb_lock);
-       INIT_LIST_HEAD(&dev->mode_config.fb_list);
-       INIT_LIST_HEAD(&dev->mode_config.crtc_list);
-       INIT_LIST_HEAD(&dev->mode_config.connector_list);
-       INIT_LIST_HEAD(&dev->mode_config.encoder_list);
-       INIT_LIST_HEAD(&dev->mode_config.property_list);
-       INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
-       INIT_LIST_HEAD(&dev->mode_config.plane_list);
-       idr_init(&dev->mode_config.crtc_idr);
-
-       drm_modeset_lock_all(dev);
-       drm_mode_create_standard_connector_properties(dev);
-       drm_modeset_unlock_all(dev);
-
-       /* Just to be sure */
-       dev->mode_config.num_fb = 0;
-       dev->mode_config.num_connector = 0;
-       dev->mode_config.num_crtc = 0;
-       dev->mode_config.num_encoder = 0;
-}
-EXPORT_SYMBOL(drm_mode_config_init);
-
 int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
 {
        uint32_t total_objects = 0;
@@ -1202,69 +1164,6 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
 }
 EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
 
-/**
- * drm_mode_config_cleanup - free up DRM mode_config info
- * @dev: DRM device
- *
- * Free up all the connectors and CRTCs associated with this DRM device, then
- * free up the framebuffers and associated buffer objects.
- *
- * Note that since this /should/ happen single-threaded at driver/device
- * teardown time, no locking is required. It's the driver's job to ensure that
- * this guarantee actually holds true.
- *
- * FIXME: cleanup any dangling user buffer objects too
- */
-void drm_mode_config_cleanup(struct drm_device *dev)
-{
-       struct drm_connector *connector, *ot;
-       struct drm_crtc *crtc, *ct;
-       struct drm_encoder *encoder, *enct;
-       struct drm_framebuffer *fb, *fbt;
-       struct drm_property *property, *pt;
-       struct drm_plane *plane, *plt;
-
-       list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
-                                head) {
-               encoder->funcs->destroy(encoder);
-       }
-
-       list_for_each_entry_safe(connector, ot,
-                                &dev->mode_config.connector_list, head) {
-               connector->funcs->destroy(connector);
-       }
-
-       list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
-                                head) {
-               drm_property_destroy(dev, property);
-       }
-
-       /*
-        * Single-threaded teardown context, so it's not required to grab the
-        * fb_lock to protect against concurrent fb_list access. Contrary, it
-        * would actually deadlock with the drm_framebuffer_cleanup function.
-        *
-        * Also, if there are any framebuffers left, that's a driver leak now,
-        * so politely WARN about this.
-        */
-       WARN_ON(!list_empty(&dev->mode_config.fb_list));
-       list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
-               drm_framebuffer_remove(fb);
-       }
-
-       list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
-                                head) {
-               plane->funcs->destroy(plane);
-       }
-
-       list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
-               crtc->funcs->destroy(crtc);
-       }
-
-       idr_destroy(&dev->mode_config.crtc_idr);
-}
-EXPORT_SYMBOL(drm_mode_config_cleanup);
-
 /**
  * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
  * @out: drm_mode_modeinfo struct to return to the user
@@ -4064,3 +3963,110 @@ int drm_format_vert_chroma_subsampling(uint32_t format)
        }
 }
 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
+
+/**
+ * drm_mode_config_init - initialize DRM mode_configuration structure
+ * @dev: DRM device
+ *
+ * Initialize @dev's mode_config structure, used for tracking the graphics
+ * configuration of @dev.
+ *
+ * Since this initializes the modeset locks, no locking is possible. Which is no
+ * problem, since this should happen single threaded at init time. It is the
+ * driver's problem to ensure this guarantee.
+ *
+ */
+void drm_mode_config_init(struct drm_device *dev)
+{
+       mutex_init(&dev->mode_config.mutex);
+       mutex_init(&dev->mode_config.idr_mutex);
+       mutex_init(&dev->mode_config.fb_lock);
+       INIT_LIST_HEAD(&dev->mode_config.fb_list);
+       INIT_LIST_HEAD(&dev->mode_config.crtc_list);
+       INIT_LIST_HEAD(&dev->mode_config.connector_list);
+       INIT_LIST_HEAD(&dev->mode_config.encoder_list);
+       INIT_LIST_HEAD(&dev->mode_config.property_list);
+       INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
+       INIT_LIST_HEAD(&dev->mode_config.plane_list);
+       idr_init(&dev->mode_config.crtc_idr);
+
+       drm_modeset_lock_all(dev);
+       drm_mode_create_standard_connector_properties(dev);
+       drm_modeset_unlock_all(dev);
+
+       /* Just to be sure */
+       dev->mode_config.num_fb = 0;
+       dev->mode_config.num_connector = 0;
+       dev->mode_config.num_crtc = 0;
+       dev->mode_config.num_encoder = 0;
+}
+EXPORT_SYMBOL(drm_mode_config_init);
+
+/**
+ * drm_mode_config_cleanup - free up DRM mode_config info
+ * @dev: DRM device
+ *
+ * Free up all the connectors and CRTCs associated with this DRM device, then
+ * free up the framebuffers and associated buffer objects.
+ *
+ * Note that since this /should/ happen single-threaded at driver/device
+ * teardown time, no locking is required. It's the driver's job to ensure that
+ * this guarantee actually holds true.
+ *
+ * FIXME: cleanup any dangling user buffer objects too
+ */
+void drm_mode_config_cleanup(struct drm_device *dev)
+{
+       struct drm_connector *connector, *ot;
+       struct drm_crtc *crtc, *ct;
+       struct drm_encoder *encoder, *enct;
+       struct drm_framebuffer *fb, *fbt;
+       struct drm_property *property, *pt;
+       struct drm_property_blob *blob, *bt;
+       struct drm_plane *plane, *plt;
+
+       list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
+                                head) {
+               encoder->funcs->destroy(encoder);
+       }
+
+       list_for_each_entry_safe(connector, ot,
+                                &dev->mode_config.connector_list, head) {
+               connector->funcs->destroy(connector);
+       }
+
+       list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
+                                head) {
+               drm_property_destroy(dev, property);
+       }
+
+       list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
+                                head) {
+               drm_property_destroy_blob(dev, blob);
+       }
+
+       /*
+        * Single-threaded teardown context, so it's not required to grab the
+        * fb_lock to protect against concurrent fb_list access. Contrary, it
+        * would actually deadlock with the drm_framebuffer_cleanup function.
+        *
+        * Also, if there are any framebuffers left, that's a driver leak now,
+        * so politely WARN about this.
+        */
+       WARN_ON(!list_empty(&dev->mode_config.fb_list));
+       list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
+               drm_framebuffer_remove(fb);
+       }
+
+       list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
+                                head) {
+               plane->funcs->destroy(plane);
+       }
+
+       list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
+               crtc->funcs->destroy(crtc);
+       }
+
+       idr_destroy(&dev->mode_config.crtc_idr);
+}
+EXPORT_SYMBOL(drm_mode_config_cleanup);