[src/trunk]: src/sys/arch/atari/dev Fix kernel crash when a user tries to swi...

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

details:   https://anonhg.NetBSD.org/src/rev/7e539b48cdcd
branches:  trunk
changeset: 326813:7e539b48cdcd
user:      tsutsui <tsutsui%NetBSD.org@localhost>
date:      Wed Feb 19 11:40:31 2014 +0000

description:
Fix kernel crash when a user tries to switch to nonexistent terminal.

Reported by Gabor Sebestyen in PR port-atari/48599.

Should be pulled up to all netbsd-6 branches.

diffstat:

 sys/arch/atari/dev/ite.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (29 lines):

diff -r ab4602c37d8a -r 7e539b48cdcd sys/arch/atari/dev/ite.c
--- a/sys/arch/atari/dev/ite.c  Wed Feb 19 09:13:21 2014 +0000
+++ b/sys/arch/atari/dev/ite.c  Wed Feb 19 11:40:31 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ite.c,v 1.71 2011/06/05 16:25:12 tsutsui Exp $ */
+/*     $NetBSD: ite.c,v 1.72 2014/02/19 11:40:31 tsutsui Exp $ */
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -44,7 +44,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ite.c,v 1.71 2011/06/05 16:25:12 tsutsui Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ite.c,v 1.72 2014/02/19 11:40:31 tsutsui Exp $");
 
 #include "opt_ddb.h"
 
@@ -665,8 +665,8 @@
        struct ite_softc        *sc;
        extern const struct cdevsw view_cdevsw;
 
-       sc = getitesp(unit);
-       if ((sc->flags & (ITE_ATTACHED | ITE_INITED)) == 0)
+       sc = device_lookup_private(&ite_cd, unit);
+       if (sc == NULL || (sc->flags & (ITE_ATTACHED | ITE_INITED)) == 0)
                return;
 
        /*