[PATCH] drm/connector: check if destroy function exist

[Andreas Kemnade <andreas@kemnade.info>]

Connectors might have not resources needed to be manually freed.
E.g. the drm_bridge_connector does not have such a callback.

Fixes: c12907be57b1 ("drm/bridge-connector: switch to using drmm allocations")
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 drivers/gpu/drm/drm_connector.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 47dc53c4a738..d2dfc6e8f7d0 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -198,7 +198,9 @@ static void drm_connector_free(struct kref *kref)
 	struct drm_device *dev = connector->dev;
 
 	drm_mode_object_unregister(dev, &connector->base);
-	connector->funcs->destroy(connector);
+
+	if (connector->funcs->destroy)
+		connector->funcs->destroy(connector);
 }
 
 void drm_connector_free_work_fn(struct work_struct *work)
@@ -216,7 +218,9 @@ void drm_connector_free_work_fn(struct work_struct *work)
 
 	llist_for_each_entry_safe(connector, n, freed, free_node) {
 		drm_mode_object_unregister(dev, &connector->base);
-		connector->funcs->destroy(connector);
+
+		if (connector->funcs->destroy)
+			connector->funcs->destroy(connector);
 	}
 }
 
-- 
2.47.3