[src/trunk]: src/sys/dev No need to detach (and return EBUSY) if dk_openmask ...

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

details:   https://anonhg.NetBSD.org/src/rev/0448f8c3b0e0
branches:  trunk
changeset: 327660:0448f8c3b0e0
user:      hannken <hannken%NetBSD.org@localhost>
date:      Thu Mar 13 10:22:35 2014 +0000

description:
No need to detach (and return EBUSY) if dk_openmask is non-zero.

diffstat:

 sys/dev/md.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (29 lines):

diff -r 5ad52f452fa0 -r 0448f8c3b0e0 sys/dev/md.c
--- a/sys/dev/md.c      Thu Mar 13 09:13:32 2014 +0000
+++ b/sys/dev/md.c      Thu Mar 13 10:22:35 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: md.c,v 1.67 2012/06/30 10:52:31 tsutsui Exp $  */
+/*     $NetBSD: md.c,v 1.68 2014/03/13 10:22:35 hannken Exp $  */
 
 /*
  * Copyright (c) 1995 Gordon W. Ross, Leo Weppelman.
@@ -40,7 +40,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: md.c,v 1.67 2012/06/30 10:52:31 tsutsui Exp $");
+__KERNEL_RCSID(0, "$NetBSD: md.c,v 1.68 2014/03/13 10:22:35 hannken Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_md.h"
@@ -340,6 +340,10 @@
                break;
        }
        dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask;
+       if (dk->dk_openmask != 0) {
+               mutex_exit(&dk->dk_openlock);
+               return 0;
+       }
 
        mutex_exit(&dk->dk_openlock);