Index: vscsi.c
===================================================================
RCS file: /cvs/src/sys/dev/vscsi.c,v
retrieving revision 1.32
diff -u -p -r1.32 vscsi.c
--- vscsi.c	22 Sep 2014 01:09:29 -0000	1.32
+++ vscsi.c	22 Sep 2014 01:10:27 -0000
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vscsi.c,v 1.32 2014/09/22 01:09:29 dlg Exp $ */
+/*	$OpenBSD: vscsi.c,v 1.31 2014/09/14 14:17:24 jsg Exp $ */
 
 /*
  * Copyright (c) 2008 David Gwynne <dlg@openbsd.org>
@@ -583,7 +583,8 @@ vscsikqfilter(dev_t dev, struct knote *k
 	SLIST_INSERT_HEAD(klist, kn, kn_selnext);
 	mtx_leave(&sc->sc_sel_mtx);
 
-	device_unref(&sc->sc_dev);
+	/* device ref is given to the knote in the klist */
+
 	return (0);
 }
 
@@ -596,6 +597,8 @@ filt_vscsidetach(struct knote *kn)
 	mtx_enter(&sc->sc_sel_mtx);
 	SLIST_REMOVE(klist, kn, knote, kn_selnext);
 	mtx_leave(&sc->sc_sel_mtx);
+
+	device_unref(&sc->sc_dev);
 }
 
 int