[src/trunk]: src/sys/dev/dkwedge dk(4): Need pdk->dk_openlock to read pdk->dk...

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

details:   https://anonhg.NetBSD.org/src/rev/c4a63956228a
branches:  trunk
changeset: 374793:c4a63956228a
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sat May 13 10:11:36 2023 +0000

description:
dk(4): Need pdk->dk_openlock to read pdk->dk_wedges.

diffstat:

 sys/dev/dkwedge/dk.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (33 lines):

diff -r 4a5348aa6747 -r c4a63956228a sys/dev/dkwedge/dk.c
--- a/sys/dev/dkwedge/dk.c      Sat May 13 09:40:47 2023 +0000
+++ b/sys/dev/dkwedge/dk.c      Sat May 13 10:11:36 2023 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dk.c,v 1.157 2023/05/10 23:08:24 riastradh Exp $       */
+/*     $NetBSD: dk.c,v 1.158 2023/05/13 10:11:36 riastradh Exp $       */
 
 /*-
  * Copyright (c) 2004, 2005, 2006, 2007 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: dk.c,v 1.157 2023/05/10 23:08:24 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dk.c,v 1.158 2023/05/13 10:11:36 riastradh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_dkwedge.h"
@@ -1333,12 +1333,14 @@ dkfirstopen(struct dkwedge_softc *sc, in
                KASSERT(sc->sc_parent->dk_rawopens < UINT_MAX);
                KASSERT(sc->sc_parent->dk_rawvp != NULL);
                mode = 0;
+               mutex_enter(&sc->sc_parent->dk_openlock);
                LIST_FOREACH(nsc, &sc->sc_parent->dk_wedges, sc_plink) {
                        if (nsc == sc || nsc->sc_dk.dk_openmask == 0)
                                continue;
                        mode = nsc->sc_mode;
                        break;
                }
+               mutex_exit(&sc->sc_parent->dk_openlock);
        }
        sc->sc_mode = mode;
        sc->sc_parent->dk_rawopens++;