diff -r -u serial-5.05/serial.c sernew-5.05/serial.c
--- serial-5.05/serial.c	Thu Sep 14 18:40:26 2000
+++ sernew-5.05/serial.c	Tue Oct 10 14:28:08 2000
@@ -565,7 +565,7 @@
 	icount = &info->state->icount;
 	do {
 		ch = serial_inp(info, UART_RX);
-		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+		if (tty->flip.count >= tty->flip.flipbuf_size)
 			goto ignore_char;
 		*tty->flip.char_buf_ptr = ch;
 		icount->rx++;
@@ -645,7 +645,7 @@
 			tty->flip.count++;
 		}
 		if ((*status & UART_LSR_OE) &&
-		    (tty->flip.count < TTY_FLIPBUF_SIZE)) {
+		    (tty->flip.count < tty->flip.flipbuf_size)) {
 			/*
 			 * Overrun is special, since it's reported
 			 * immediately, and doesn't affect the current
@@ -5171,7 +5171,8 @@
 	serial_driver.init_termios = tty_std_termios;
 	serial_driver.init_termios.c_cflag =
 		B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-	serial_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+	serial_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS | TTY_DRIVER_SPECIAL_FLIPSIZE;
+        serial_driver.flip_size = 15000; /* use 60004 bytes */
 	serial_driver.refcount = &serial_refcount;
 	serial_driver.table = serial_table;
 	serial_driver.termios = serial_termios;