smb: client: change return value in open_cached_dir_by_dentry() if !cfids

Change return value from -ENOENT to -EOPNOTSUPP to maintain consistency
with the return value of open_cached_dir() for the same case. This
change is safe as the only calling function does not differentiate
between these return values.

Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: hac-v

fs/smb/client/cached_dir.c

@@ -391,7 +391,7 @@ int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
 	struct cached_fids *cfids = tcon->cfids;
 
 	if (cfids == NULL)
-		return -ENOENT;
+		return -EOPNOTSUPP;
 
 	spin_lock(&cfids->cfid_list_lock);
 	list_for_each_entry(cfid, &cfids->entries, entry) {