kms req builder: rename destroy_cb -> release_cb

Author: ardera

src/kms/req_builder.c

@@ -344,6 +344,7 @@ static void kms_req_builder_destroy(struct kms_req_builder *builder) {
     }
     if (builder->req != NULL) {
         drmModeAtomicFree(builder->req);
+        builder->req = NULL;
     }
     drm_resources_unref(builder->res);
     free(builder);
@@ -683,6 +684,7 @@ static void on_kms_req_release(void *userdata) {
         b->release_cb(b->release_cb_userdata);
     }
 
+    ASSERT(refcount_is_one(&b->n_refs));
     kms_req_builder_unref(b);
 }
 

src/kms/req_builder.h

@@ -201,6 +201,6 @@ struct kms_req *kms_req_builder_build(struct kms_req_builder *builder);
 
 int kms_req_commit_blocking(struct kms_req *req, struct drmdev *drmdev, uint64_t *vblank_ns_out);
 
-int kms_req_commit_nonblocking(struct kms_req *req, struct drmdev *drmdev, kmsreq_scanout_cb_t scanout_cb, void *userdata, void_callback_t destroy_cb);
+int kms_req_commit_nonblocking(struct kms_req *req, struct drmdev *drmdev, kmsreq_scanout_cb_t scanout_cb, void *userdata, void_callback_t release_cb);
 
 #endif // _FLUTTERPI_SRC_MODESETTING_REQ_BUILDER_H_