Merged revisions 256265 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

................
  r256265 | rmudgett | 2010-04-05 19:39:44 -0500 (Mon, 05 Apr 2010) | 12 lines
  
  Merged revisions 256225 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r256225 | rmudgett | 2010-04-05 19:10:16 -0500 (Mon, 05 Apr 2010) | 5 lines
    
    DAHDI/PRI call to pri_channel_bridge() not protected by PRI lock.
    
    SWP-1231
    ABE-2163
  ........
................


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@256266 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -4146,7 +4146,6 @@ static enum ast_bridge_result dahdi_bridge(struct ast_channel *c0, struct ast_ch
 
 #ifdef PRI_2BCT
 	int triedtopribridge = 0;
-	q931_call *q931c0 = NULL, *q931c1 = NULL;
 #endif
 
 	/* For now, don't attempt to native bridge if either channel needs DTMF detection.
@@ -4367,13 +4366,15 @@ static enum ast_bridge_result dahdi_bridge(struct ast_channel *c0, struct ast_ch
 		}
 
 #ifdef PRI_2BCT
-		q931c0 = p0->call;
-		q931c1 = p1->call;
-		if (p0->transfer && p1->transfer 
-		    && q931c0 && q931c1 
-		    && !triedtopribridge) {
-			pri_channel_bridge(q931c0, q931c1);
+		if (!triedtopribridge) {
 			triedtopribridge = 1;
+			if (p0->pri && p0->pri == p1->pri && p0->transfer && p1->transfer) {
+				ast_mutex_lock(&p0->pri->lock);
+				if (p0->call && p1->call) {
+					pri_channel_bridge(p0->call, p1->call);
+				}
+				ast_mutex_unlock(&p0->pri->lock);
+			}
 		}
 #endif