From e17878933fc540dcd533e3a96f0a2a393e2a8427 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Wed, 23 Jul 2014 13:06:23 -0700
Subject: [PATCH] ITS#7904 writewait patch

Assigned ITS#, tweaking. This ITS includes
	4f05d992f2146921dbc13d3477de9918f20172b9
	716b35e191fb587b352922c76d65843449d870cb
	be792fae2ccd4f39ee2b975bcc26a6e21dfc3586
---
 servers/slapd/back-mdb/search.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/servers/slapd/back-mdb/search.c b/servers/slapd/back-mdb/search.c
index a79871b74f..c63db9c164 100644
--- a/servers/slapd/back-mdb/search.c
+++ b/servers/slapd/back-mdb/search.c
@@ -690,12 +690,15 @@ dn2entry_retry:
 		id = mdb_idl_first( candidates, &cursor );
 	}
 
-	cb.sc_writewait = mdb_writewait;
-	cb.sc_private = &wwctx;
 	wwctx.flag = 0;
-	wwctx.txn = ltid;
-	cb.sc_next = op->o_callback;
-	op->o_callback = &cb;
+	/* If we're running in our own read txn */
+	if (  moi == &opinfo ) {
+		cb.sc_writewait = mdb_writewait;
+		cb.sc_private = &wwctx;
+		wwctx.txn = ltid;
+		cb.sc_next = op->o_callback;
+		op->o_callback = &cb;
+	}
 
 	while (id != NOID)
 	{
@@ -1083,17 +1086,6 @@ loop_continue:
 			id = mdb_idl_next( candidates, &cursor );
 		}
 	}
-	/* remove our writewait callback */
-	{
-		slap_callback **scp = &op->o_callback;
-		while ( *scp ) {
-			if ( *scp == &cb ) {
-				*scp = cb.sc_next;
-				cb.sc_private = NULL;
-				break;
-			}
-		}
-	}
 
 nochange:
 	rs->sr_ctrls = NULL;
-- 
2.39.2