From d7c4be30ba6d0a89ca801c95aa3ea710c46dbf56 Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Thu, 7 Mar 2013 21:41:01 +1100
Subject: [PATCH] Only set stratum auth once to prevent multiple threads being
 started.

---
 cgminer.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cgminer.c b/cgminer.c
index b94d750a..f073f9ee 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -4997,7 +4997,10 @@ retry_stratum:
 			return false;
 		if (!auth_stratum(pool))
 			return false;
-		pool->stratum_auth = true;
+		/* Only set stratum_auth once to prevent multiple threads
+		 * being started */
+		if (pool_tset(pool, &pool->stratum_auth))
+			return true;
 		pool->idle = false;
 		init_stratum_thread(pool);
 		return true;