don't modify od->filp at all

make put_filp() conditional on flag set by finish_open()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index 7a33f07..18b9326 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2708,10 +2708,8 @@
 		path_put(&nd->root);
 	if (base)
 		fput(base);
-	if (od.filp) {
-		BUG_ON(od.filp->f_path.dentry);
+	if (!(opened & FILE_OPENED))
 		put_filp(od.filp);
-	}
 	if (res == ERR_PTR(-EOPENSTALE)) {
 		if (flags & LOOKUP_RCU)
 			res = ERR_PTR(-ECHILD);