[src/trunk]: src/sys/dev/usb make sure kernel lock is held when changing isoc...

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

details:   https://anonhg.NetBSD.org/src/rev/88fe7ae2596c
branches:  trunk
changeset: 772988:88fe7ae2596c
user:      plunky <plunky%NetBSD.org@localhost>
date:      Mon Jan 23 08:30:24 2012 +0000

description:
make sure kernel lock is held when changing isoc configuration
(this is called from sysctl and autoconf)

diffstat:

 sys/dev/usb/ubt.c |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (31 lines):

diff -r 2898e2e707f6 -r 88fe7ae2596c sys/dev/usb/ubt.c
--- a/sys/dev/usb/ubt.c Mon Jan 23 06:17:58 2012 +0000
+++ b/sys/dev/usb/ubt.c Mon Jan 23 08:30:24 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ubt.c,v 1.43 2012/01/14 21:37:17 plunky Exp $  */
+/*     $NetBSD: ubt.c,v 1.44 2012/01/23 08:30:24 plunky Exp $  */
 
 /*-
  * Copyright (c) 2006 Itronix Inc.
@@ -67,7 +67,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ubt.c,v 1.43 2012/01/14 21:37:17 plunky Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ubt.c,v 1.44 2012/01/23 08:30:24 plunky Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -727,8 +727,11 @@
        if (sc->sc_enabled)
                return EBUSY;
 
+       KERNEL_LOCK(1, curlwp);
        sc->sc_config = t;
-       return ubt_set_isoc_config(sc);
+       error = ubt_set_isoc_config(sc);
+       KERNEL_UNLOCK_ONE(curlwp);
+       return error;
 }
 
 static void