Merged revisions 89457 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r89457 | mmichelson | 2007-11-20 11:50:31 -0600 (Tue, 20 Nov 2007) | 9 lines

According to comments in main/pbx.c, it is essential that if we are going to lock
the conlock as well as the hints lock, it must be locked in that respective order.
In order to prevent a potential deadlock, we need to lock the conlock prior to 
locking the hints lock in ast_hint_state_changed (see the call stack example on
issue #11323 for how this can happen).

(closes issue #11323, reported  by eelcob, suggestion for patch by eelcob, patch by me)


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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89458 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/pbx.c

@@ -2742,6 +2742,7 @@ static void handle_statechange(const char *device)
 {
 	struct ast_hint *hint;
 
+	ast_rdlock_contexts();
 	AST_RWLIST_RDLOCK(&hints);
 
 	AST_RWLIST_TRAVERSE(&hints, hint, list) {
@@ -2779,6 +2780,7 @@ static void handle_statechange(const char *device)
 	}
 
 	AST_RWLIST_UNLOCK(&hints);
+	ast_unlock_contexts();
 }
 
 static int statechange_queue(const char *dev)