Merged revisions 189277 via svnmerge from

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

........
  r189277 | mmichelson | 2009-04-20 09:04:41 -0500 (Mon, 20 Apr 2009) | 12 lines
  
  Move the check for chan->fdno == -1 to after the zombie/hangup check.
  
  Many users were finding that their hung up channels were staying up and
  causing 100% CPU usage.
  
  (issue #14723)
  Reported by: seadweller
  Patches:
        14723_1-4-tip.patch uploaded by mmichelson (license 60)
  Tested by: falves11, bamby
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@189278 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -2842,6 +2842,13 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 		goto done;
 	}
 
+	/* Stop if we're a zombie or need a soft hangup */
+	if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) {
+		if (chan->generator)
+			ast_deactivate_generator(chan);
+		goto done;
+	}
+
 	if (chan->fdno == -1) {
 #ifdef AST_DEVMODE
 		ast_log(LOG_ERROR, "ast_read() called with no recorded file descriptor.\n");
@@ -2851,13 +2858,6 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 		f = &ast_null_frame;
 		goto done;
 	}
-
-	/* Stop if we're a zombie or need a soft hangup */
-	if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) {
-		if (chan->generator)
-			ast_deactivate_generator(chan);
-		goto done;
-	}
 	prestate = chan->_state;
 
 	/* Read and ignore anything on the alertpipe, but read only