NFSv4.2: Add special handling for LISTXATTR receiving NFS4ERR_NOXATTR

We can translate this into an empty response list instead of passing an
error up to userspace.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/nfs42xdr.c

@@ -569,6 +569,14 @@ static int decode_listxattrs(struct xdr_stream *xdr,
 		 */
 		if (status == -ETOOSMALL)
 			status = -ERANGE;
+		/*
+		 * Special case: for LISTXATTRS, NFS4ERR_NOXATTR
+		 * should be translated to success with zero-length reply.
+		 */
+		if (status == -ENODATA) {
+			res->eof = true;
+			status = 0;
+		}
 		goto out;
 	}