Merged revisions 139456 via svnmerge from

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

........
r139456 | mmichelson | 2008-08-22 11:57:38 -0500 (Fri, 22 Aug 2008) | 7 lines

Prevent a deadlock in chan_iax2 resulting from
incorrect locking order between iax2_pvt and
ast_channel structures.

AST-13


........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@139457 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -8787,11 +8787,14 @@ retryowner:
 
 					pbx_builtin_setvar_helper(bridged_chan, "BLINDTRANSFER", iaxs[fr->callno]->owner->name);
 					if (!strcmp(ies.called_number, ast_parking_ext())) {
-						if (iax_park(bridged_chan, iaxs[fr->callno]->owner)) {
+						struct ast_channel *saved_channel = iaxs[fr->callno]->owner;
+						ast_mutex_unlock(iaxsl[fr->callno]);
+						if (iax_park(bridged_chan, saved_channel)) {
 							ast_log(LOG_WARNING, "Failed to park call on '%s'\n", bridged_chan->name);
 						} else {
 							ast_debug(1, "Parked call on '%s'\n", ast_bridged_channel(iaxs[fr->callno]->owner)->name);
 						}
+						ast_mutex_lock(iaxsl[fr->callno]);
 					} else {
 						if (ast_async_goto(bridged_chan, iaxs[fr->callno]->context, ies.called_number, 1))
 							ast_log(LOG_WARNING, "Async goto of '%s' to '%s@%s' failed\n", bridged_chan->name,