From a5e0d599dee25c3d7c29c0875486769e299c8ebb Mon Sep 17 00:00:00 2001
From: Nick Banks <nibanks@microsoft.com>
Date: Tue, 7 Feb 2017 17:01:24 -0800
Subject: [PATCH] Retry otInstanceInit multiple times in otNodeInit (#1271)

---
 examples/drivers/windows/otNodeApi/otNodeApi.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/examples/drivers/windows/otNodeApi/otNodeApi.cpp b/examples/drivers/windows/otNodeApi/otNodeApi.cpp
index 2d3c403b5..6bc22ce16 100644
--- a/examples/drivers/windows/otNodeApi/otNodeApi.cpp
+++ b/examples/drivers/windows/otNodeApi/otNodeApi.cpp
@@ -766,8 +766,17 @@ OTNODEAPI otNode* OTCALL otNodeInit(uint32_t id)
         otvmpRemoveVirtualBus(gVmpHandle, newBusIndex);
         return nullptr;
     }
-    
-    auto instance = otInstanceInit(ApiInstance, &ifGuid);
+
+    // Try multiple times to instantiate the otInstance, as the MP comes up first
+    // and the LWF driver might not be ready immedaitely.
+    tries = 0;
+    otInstance *instance = nullptr;
+    do
+    {
+        if (tries != 0) Sleep(100);
+        instance = otInstanceInit(ApiInstance, &ifGuid);
+    } while (instance == nullptr && ++tries <= 30);
+
     if (instance == nullptr)
     {
         printf("otInstanceInit failed!\r\n");