From 5fab60a07128991587da7d4fcafdd1763a0df689 Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 14 Nov 2014 11:31:10 +0000
Subject: [PATCH] In vfs_write_suspend_umnt(), if suspension cannot be
 established, do not forget to restore write ops count when returning the
 error.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
---
 sys/kern/vfs_vnops.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
index b3e1c3bf45cf..ee45e01aecfe 100644
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -1881,8 +1881,10 @@ vfs_write_suspend_umnt(struct mount *mp)
 	for (;;) {
 		vn_finished_write(mp);
 		error = vfs_write_suspend(mp, 0);
-		if (error != 0)
+		if (error != 0) {
+			vn_start_write(NULL, &mp, V_WAIT);
 			return (error);
+		}
 		MNT_ILOCK(mp);
 		if ((mp->mnt_kern_flag & MNTK_SUSPENDED) != 0)
 			break;