From 4039bb7c824968c46ec054cb3ea586cc81de6623 Mon Sep 17 00:00:00 2001
From: trasz <trasz@FreeBSD.org>
Date: Tue, 16 Dec 2008 20:59:27 +0000
Subject: Fix forced mdconfig -du.  E.g. the following would previously result
 in panic:

mdconfig -af blah.img -o force
mount /dev/md0 /mnt
mdconfig -du 0

Reviewed by:	scottl
Approved by:	rwatson (mentor)
Sponsored by:	FreeBSD Foundation
---
 sys/dev/md/md.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'sys/dev/md/md.c')

diff --git a/sys/dev/md/md.c b/sys/dev/md/md.c
index f4230a2..bb9e64b 100644
--- a/sys/dev/md/md.c
+++ b/sys/dev/md/md.c
@@ -374,8 +374,11 @@ g_md_access(struct g_provider *pp, int r, int w, int e)
 	struct md_s *sc;
 
 	sc = pp->geom->softc;
-	if (sc == NULL)
+	if (sc == NULL) {
+		if (r <= 0 && w <= 0 && e <= 0)
+			return (0);
 		return (ENXIO);
+	}
 	r += pp->acr;
 	w += pp->acw;
 	e += pp->ace;
-- 
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