On 2016-12-13 06:08 PM, Daniel Vetter wrote:
Only static connectors should be left at this point, and we should be
able to clean them out by simply dropping that last reference still
around from drm_connector_init.
If that leaves anything behind then we have a driver bug.
Doing the final cleanup this way also allows us to use
drm_connector_iter, removing the very last place where we walk
connector_list explicitly in drm core&helpers.
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_mode_config.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index 747a26df0e90..a942536abd60 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -397,7 +397,8 @@ EXPORT_SYMBOL(drm_mode_config_init);
*/
void drm_mode_config_cleanup(struct drm_device *dev)
{
- struct drm_connector *connector, *ot;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
struct drm_crtc *crtc, *ct;
struct drm_encoder *encoder, *enct;
struct drm_framebuffer *fb, *fbt;
@@ -410,10 +411,16 @@ void drm_mode_config_cleanup(struct drm_device *dev)
encoder->funcs->destroy(encoder);
}
- list_for_each_entry_safe(connector, ot,
- &dev->mode_config.connector_list, head) {
- connector->funcs->destroy(connector);
+ drm_connector_list_iter_get(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+ /* drm_connector_list_iter holds an full reference to the
+ * current connector itself, which means it is inherently safe
+ * against unreferencing the current connector - but not against
+ * deleting it right away. */
+ drm_connector_unreference(connector);
}
+ drm_connector_list_iter_put(&conn_iter);
+ WARN_ON(!list_empty(&dev->mode_config.connector_list));
list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
head) {
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
Harry
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