Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-serial

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / serial / serial_core.c

diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 9583180..d5f636f 100644 (file)
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -696,7 +696,8 @@ 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) |
@@ -801,7 +802,8 @@ 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;