From 68a258fce5a5b669d6a9f142b5a07a01e2fb79fe Mon Sep 17 00:00:00 2001
From: Binyang Li <binyli@microsoft.com>
Date: Fri, 24 Mar 2023 05:31:10 +0000
Subject: [PATCH] Fix postSend bug

---
 src/ib.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ib.cc b/src/ib.cc
index 1c7c0c71..db8e0325 100644
--- a/src/ib.cc
+++ b/src/ib.cc
@@ -383,6 +383,10 @@ int mscclppIbQp::stageSendWithImm(struct mscclppIbMr *ibMr, const mscclppIbMrInf
 
 int mscclppIbQp::postSend()
 {
+  if (this->wrn == 0) {
+    return 0;
+  }
+
   struct ibv_send_wr *bad_wr;
   int ret = ibv_post_send(this->qp, this->wrs, &bad_wr);
   if (ret != 0) {