Merged revisions 51197 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.2

........
r51197 | russell | 2007-01-17 15:17:21 -0600 (Wed, 17 Jan 2007) | 3 lines

Move the check for a failure of ast_channel_alloc() to before locking the
pvt structure again.  Otherwise, on a failure, this will cause a deadlock.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@51198 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -3735,11 +3735,11 @@ static struct ast_channel *sip_new(struct sip_pvt *i, int state, const char *tit
 		tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "SIP/%s-%08x", my_name, (int)(long) i);
 
 	}
-	ast_mutex_lock(&i->lock);
 	if (!tmp) {
 		ast_log(LOG_WARNING, "Unable to allocate AST channel structure for SIP channel\n");
 		return NULL;
 	}
+	ast_mutex_lock(&i->lock);
 	tmp->tech = &sip_tech;
 
 	/* Select our native format based on codec preference until we receive