[src/trunk]: src/sys/arch/usermode/dev no need to poll for pending drawing op...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cf70d678b8ef
branches:  trunk
changeset: 772346:cf70d678b8ef
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Fri Dec 30 14:22:41 2011 +0000

description:
no need to poll for pending drawing ops if no client is connected

diffstat:

 sys/arch/usermode/dev/vncfb.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (28 lines):

diff -r ddc8b09dfcca -r cf70d678b8ef sys/arch/usermode/dev/vncfb.c
--- a/sys/arch/usermode/dev/vncfb.c     Fri Dec 30 14:20:33 2011 +0000
+++ b/sys/arch/usermode/dev/vncfb.c     Fri Dec 30 14:22:41 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: vncfb.c,v 1.7 2011/12/30 14:20:33 jmcneill Exp $ */
+/* $NetBSD: vncfb.c,v 1.8 2011/12/30 14:22:41 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2011 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -35,7 +35,7 @@
 #include "opt_wsemul.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vncfb.c,v 1.7 2011/12/30 14:20:33 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vncfb.c,v 1.8 2011/12/30 14:22:41 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -357,7 +357,8 @@
 
        /* barrier */
        while (sc->sc_rfb.nupdates > 0)
-               thunk_rfb_poll(&sc->sc_rfb, NULL);
+               if (thunk_rfb_poll(&sc->sc_rfb, NULL) == -1)
+                       break;
 
        ops->copyrows(ri, srcrow, dstrow, nrows);