afs: Invalid op ID should abort with RXGEN_OPCODE

When we are given an invalid operation ID, we should abort that with
RXGEN_OPCODE rather than RX_INVALID_OPERATION.

Also map RXGEN_OPCODE to -ENOTSUPP.
Signed-off-by: David Howells <dhowells@redhat.com>

fs/afs/misc.c

@@ -84,6 +84,8 @@ int afs_abort_to_error(u32 abort_code)
 	case RXKADDATALEN:	return -EKEYREJECTED;
 	case RXKADILLEGALLEVEL:	return -EKEYREJECTED;
 
+	case RXGEN_OPCODE:	return -ENOTSUPP;
+
 	default:		return -EREMOTEIO;
 	}
 }

fs/afs/rxrpc.c

@@ -465,7 +465,7 @@ static void afs_deliver_to_call(struct afs_call *call)
 						abort_code, -ret, "KNC");
 			goto do_abort;
 		case -ENOTSUPP:
-			abort_code = RX_INVALID_OPERATION;
+			abort_code = RXGEN_OPCODE;
 			rxrpc_kernel_abort_call(afs_socket, call->rxcall,
 						abort_code, -ret, "KIV");
 			goto do_abort;