[PATCH v2 2/4] NFSv4: Don't apply change_info4 twice on rename within a directory

[Trond Myklebust <trond.myklebust@primarydata.com>]

If a file is renamed, but stays in the same directory, we will still receive
2 change_info4 structures describing the change to that directory, but we
only want to apply it once.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
 fs/nfs/nfs4proc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 4010c33151ad..1e797bf74aaf 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4159,8 +4159,11 @@ static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 	if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
 		return 0;
 
-	update_changeattr(old_dir, &res->old_cinfo);
-	update_changeattr(new_dir, &res->new_cinfo);
+	if (task->tk_status == 0) {
+		update_changeattr(old_dir, &res->old_cinfo);
+		if (new_dir != old_dir)
+			update_changeattr(new_dir, &res->new_cinfo);
+	}
 	return 1;
 }
 
-- 
2.9.3