Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/dev/md.c,v
rcsdiff: /ftp/cvs/cvsroot/src/sys/dev/md.c,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.76
retrieving revision 1.77
diff -u -p -r1.76 -r1.77
--- src/sys/dev/md.c	2016/01/04 16:24:52	1.76
+++ src/sys/dev/md.c	2016/07/27 01:09:44	1.77
@@ -1,4 +1,4 @@
-/*	$NetBSD: md.c,v 1.76 2016/01/04 16:24:52 hannken Exp $	*/
+/*	$NetBSD: md.c,v 1.77 2016/07/27 01:09:44 pgoyette Exp $	*/
 
 /*
  * Copyright (c) 1995 Gordon W. Ross, Leo Weppelman.
@@ -40,7 +40,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: md.c,v 1.76 2016/01/04 16:24:52 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: md.c,v 1.77 2016/07/27 01:09:44 pgoyette Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_md.h"
@@ -414,13 +414,13 @@ mdstrategy(struct buf *bp)
 
 	sc = device_lookup_private(&md_cd, MD_UNIT(bp->b_dev));
 
-	mutex_enter(&sc->sc_lock);
-
 	if (sc == NULL || sc->sc_type == MD_UNCONFIGURED) {
 		bp->b_error = ENXIO;
 		goto done;
 	}
 
+	mutex_enter(&sc->sc_lock);
+
 	switch (sc->sc_type) {
 #if MEMORY_DISK_SERVER
 	case MD_UMEM_SERVER: