Added comments
diff --git a/src/core/channel/http_server_filter.c b/src/core/channel/http_server_filter.c
index e5ce7a5..d3a01fd 100644
--- a/src/core/channel/http_server_filter.c
+++ b/src/core/channel/http_server_filter.c
@@ -47,7 +47,11 @@
grpc_linked_mdelem status;
grpc_stream_op_buffer *recv_ops;
+ /** Closure to call when finished with the hs_on_recv hook */
grpc_iomgr_closure *on_done_recv;
+ /** Receive closures are chained: we inject this closure as the on_done_recv
+ up-call on transport_op, and remember to call our on_done_recv member
+ after handling it. */
grpc_iomgr_closure hs_on_recv;
} call_data;