From dd475487c20d8ae44fc5bb36afc50592807b44de Mon Sep 17 00:00:00 2001
From: Muxi Yan <mxyan@google.com>
Date: Thu, 13 Apr 2017 08:54:22 -0700
Subject: [PATCH] Minor patch

---
 .../chttp2/transport/chttp2_transport.c          | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 16cf40c2c9..e2f7bb433a 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1446,14 +1446,16 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
     GPR_ASSERT(!s->pending_byte_stream);
     s->recv_message_ready = op_payload->recv_message.recv_message_ready;
     s->recv_message = op_payload->recv_message.recv_message;
-    if (s->pending_byte_stream) {
-      already_received = s->frame_storage.length;
-    } else {
-      already_received = s->frame_storage.length +
-                         s->unprocessed_incoming_frames_buffer.length;
+    if (s->id != 0) {
+      if (s->pending_byte_stream) {
+        already_received = s->frame_storage.length;
+      } else {
+        already_received = s->frame_storage.length +
+                           s->unprocessed_incoming_frames_buffer.length;
+      }
+      incoming_byte_stream_update_flow_control(exec_ctx, t, s, 5,
+                                               already_received);
     }
-    incoming_byte_stream_update_flow_control(exec_ctx, t, s, 5,
-                                             already_received);
     grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
   }
 
-- 
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