diff --git a/drivers/net/ppp_async.c b/drivers/net/ppp_async.c
index 27f5b90..8d278c8 100644
--- a/drivers/net/ppp_async.c
+++ b/drivers/net/ppp_async.c
@@ -309,16 +309,11 @@
 		err = 0;
 		break;
 
-	case TCGETS:
-	case TCGETA:
-		err = n_tty_ioctl(tty, file, cmd, arg);
-		break;
-
 	case TCFLSH:
 		/* flush our buffers and the serial port's buffer */
 		if (arg == TCIOFLUSH || arg == TCOFLUSH)
 			ppp_async_flush_output(ap);
-		err = n_tty_ioctl(tty, file, cmd, arg);
+		err = tty_perform_flush(tty, arg);
 		break;
 
 	case FIONREAD:
@@ -329,7 +324,8 @@
 		break;
 
 	default:
-		err = -ENOIOCTLCMD;
+		/* Try the various mode ioctls */
+		err = tty_mode_ioctl(tty, file, cmd, arg);
 	}
 
 	ap_put(ap);