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-rw-r--r--drivers/serial/mpc52xx_uart.c3
-rw-r--r--drivers/serial/serial_core.c6
2 files changed, 5 insertions, 4 deletions
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 6459edc7f5c..1b2cdc91c22 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -728,8 +728,7 @@ mpc52xx_uart_probe(struct platform_device *dev)
spin_lock_init(&port->lock);
port->uartclk = __res.bi_ipbfreq / 2; /* Look at CTLR doc */
- port->fifosize = 255; /* Should be 512 ! But it can't be */
- /* stored in a unsigned char */
+ port->fifosize = 512;
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF |
( uart_console(port) ? 0 : UPF_IOREMAP );
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 17839e753e4..3805f467b2f 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -691,7 +691,8 @@ static int uart_set_info(struct uart_state *state,
(new_serial.baud_base != port->uartclk / 16) ||
(close_delay != state->close_delay) ||
(closing_wait != state->closing_wait) ||
- (new_serial.xmit_fifo_size != port->fifosize) ||
+ (new_serial.xmit_fifo_size &&
+ new_serial.xmit_fifo_size != port->fifosize) ||
(((new_flags ^ old_flags) & ~UPF_USR_MASK) != 0))
goto exit;
port->flags = ((port->flags & ~UPF_USR_MASK) |
@@ -796,7 +797,8 @@ static int uart_set_info(struct uart_state *state,
port->custom_divisor = new_serial.custom_divisor;
state->close_delay = close_delay;
state->closing_wait = closing_wait;
- port->fifosize = new_serial.xmit_fifo_size;
+ if (new_serial.xmit_fifo_size)
+ port->fifosize = new_serial.xmit_fifo_size;
if (state->info->tty)
state->info->tty->low_latency =
(port->flags & UPF_LOW_LATENCY) ? 1 : 0;