[src/trunk]: src/sys/dev Operation handle_with_strategy() also needs the

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

details:   https://anonhg.NetBSD.org/src/rev/a3c2ab491e2a
branches:  trunk
changeset: 837553:a3c2ab491e2a
user:      hannken <hannken%NetBSD.org@localhost>
date:      Mon Dec 10 15:22:35 2018 +0000

description:
Operation handle_with_strategy() also needs the
fstrans_start_lazy() / fstrans_done() bracket.

PR kern/53624 (dom0 freeze on domU exit)

diffstat:

 sys/dev/vnd.c |  14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diffs (55 lines):

diff -r 2152dc27d0f1 -r a3c2ab491e2a sys/dev/vnd.c
--- a/sys/dev/vnd.c     Mon Dec 10 15:08:23 2018 +0000
+++ b/sys/dev/vnd.c     Mon Dec 10 15:22:35 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vnd.c,v 1.269 2018/10/07 12:00:07 mlelstv Exp $        */
+/*     $NetBSD: vnd.c,v 1.270 2018/12/10 15:22:35 hannken Exp $        */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 2008 The NetBSD Foundation, Inc.
@@ -91,7 +91,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.269 2018/10/07 12:00:07 mlelstv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.270 2018/12/10 15:22:35 hannken Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_vnd.h"
@@ -733,12 +733,17 @@
                bp->b_bcount = obp->b_bcount;
                BIO_COPYPRIO(bp, obp);
 
+               /* Make sure the request succeeds while suspending this fs. */
+               fstrans_start_lazy(vnd->sc_vp->v_mount);
+
                /* Handle the request using the appropriate operations. */
                if ((vnd->sc_flags & VNF_USE_VN_RDWR) == 0)
                        handle_with_strategy(vnd, obp, bp);
                else
                        handle_with_rdwr(vnd, obp, bp);
 
+               fstrans_done(vnd->sc_vp->v_mount);
+
                s = splbio();
                continue;
 
@@ -804,9 +809,6 @@
                    bp->b_bcount);
 #endif
 
-       /* Make sure the request succeeds while suspending this fs. */
-       fstrans_start_lazy(vp->v_mount);
-
        /* Issue the read or write operation. */
        bp->b_error =
            vn_rdwr(doread ? UIO_READ : UIO_WRITE,
@@ -828,8 +830,6 @@
        else
                mutex_exit(vp->v_interlock);
 
-       fstrans_done(vp->v_mount);
-
        /* We need to increase the number of outputs on the vnode if
         * there was any write to it. */
        if (!doread) {