From 64747bca1d386fa7c8528f7a7fc1f4f9ddfd4b63 Mon Sep 17 00:00:00 2001
From: hannken <hannken@NetBSD.org>
Date: Tue, 13 Oct 2009 12:37:19 +0000
Subject: [PATCH] Fix a race where the backing store thread runs (and exits
 immediately) before kthread_create() returns.

---
 sys/dev/fss.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/sys/dev/fss.c b/sys/dev/fss.c
index c6f7f10b2c3f..11038a97895f 100644
--- a/sys/dev/fss.c
+++ b/sys/dev/fss.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: fss.c,v 1.63 2009/06/29 05:08:17 dholland Exp $	*/
+/*	$NetBSD: fss.c,v 1.64 2009/10/13 12:37:19 hannken Exp $	*/
 
 /*-
  * Copyright (c) 2003 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fss.c,v 1.63 2009/06/29 05:08:17 dholland Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fss.c,v 1.64 2009/10/13 12:37:19 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -446,11 +446,12 @@ fss_softc_alloc(struct fss_softc *sc)
 		sc->sc_indir_data = NULL;
 	}
 
-	if ((error = kthread_create(PRI_BIO, 0, NULL, fss_bs_thread, sc,
-	    &sc->sc_bs_lwp, device_xname(sc->sc_dev))) != 0)
-		return error;
-
 	sc->sc_flags |= FSS_BS_THREAD;
+	if ((error = kthread_create(PRI_BIO, 0, NULL, fss_bs_thread, sc,
+	    &sc->sc_bs_lwp, device_xname(sc->sc_dev))) != 0) {
+		sc->sc_flags &= ~FSS_BS_THREAD;
+		return error;
+	}
 
 	disk_attach(sc->sc_dkdev);