When using register_serial the xmit_fifo_size parameter is accepted by the
 8250 driver, and copied to the uart_port fifosize parameter, however
 autoconfigure then comes along and overrides this from the
 dfl_xmit_fifo_size,
 
 this patch checks if fifosize is 0 and if it is updates from the default,
 otherwise it accepts the value,
 
 ignore the 2.6.4 in the patch, it is against 2.6.6.
 
 Dave.
 
 
--- linux26/drivers/serial/8250.c	2004-05-11 10:42:56.000000000 +1000
+++ linux-2.6.4/drivers/serial/8250.c	2004-05-11 14:02:45.000000000 +1000
@@ -697,7 +697,8 @@
 #endif
 	serial_outp(up, UART_LCR, save_lcr);
 
-	up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;
+	if (up->port.fifosize==0)
+		up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;
 	up->capabilities = uart_config[up->port.type].flags;
 
 	if (up->port.type == PORT_UNKNOWN)