[src/trunk]: src/sys/dev more sanity checks

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

details:   https://anonhg.NetBSD.org/src/rev/d8f3e1d97061
branches:  trunk
changeset: 812561:d8f3e1d97061
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Mon Dec 21 12:30:29 2015 +0000

description:
more sanity checks

diffstat:

 sys/dev/dksubr.c |  11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diffs (39 lines):

diff -r a0f9ea85a52b -r d8f3e1d97061 sys/dev/dksubr.c
--- a/sys/dev/dksubr.c  Mon Dec 21 12:11:23 2015 +0000
+++ b/sys/dev/dksubr.c  Mon Dec 21 12:30:29 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: dksubr.c,v 1.83 2015/12/08 20:36:14 christos Exp $ */
+/* $NetBSD: dksubr.c,v 1.84 2015/12/21 12:30:29 mlelstv Exp $ */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 1999, 2002, 2008 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: dksubr.c,v 1.83 2015/12/08 20:36:14 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dksubr.c,v 1.84 2015/12/21 12:30:29 mlelstv Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -94,6 +94,8 @@
 void
 dk_attach(struct dk_softc *dksc)
 {
+       KASSERT(dksc->sc_dev != NULL);
+
        mutex_init(&dksc->sc_iolock, MUTEX_DEFAULT, IPL_VM);
        dksc->sc_flags |= DKF_READYFORDUMP;
 #ifdef DIAGNOSTIC
@@ -307,6 +309,11 @@
        const struct dkdriver *dkd = dksc->sc_dkdev.dk_driver;
        int error;
 
+       if (!(dksc->sc_flags & DKF_INITED)) {
+               DPRINTF_FOLLOW(("%s: not inited\n", __func__));
+               return;
+       }
+
        mutex_enter(&dksc->sc_iolock);
 
        if (bp != NULL)