serial: core: Perform RTS signalling before soft flow ctrl

When throttling, time is of the essence; try RTS signalling before
soft flow control, which will take longer.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index fa7f442..be9359f 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -641,11 +641,11 @@ static void uart_throttle(struct tty_struct *tty)
                mask &= ~port->status;
        }
 
-       if (mask & UPSTAT_AUTOXOFF)
-               uart_send_xchar(tty, STOP_CHAR(tty));
-
        if (mask & UPSTAT_AUTORTS)
                uart_clear_mctrl(port, TIOCM_RTS);
+
+       if (mask & UPSTAT_AUTOXOFF)
+               uart_send_xchar(tty, STOP_CHAR(tty));
 }
 
 static void uart_unthrottle(struct tty_struct *tty)
@@ -664,11 +664,11 @@ static void uart_unthrottle(struct tty_struct *tty)
                mask &= ~port->status;
        }
 
-       if (mask & UPSTAT_AUTOXOFF)
-               uart_send_xchar(tty, START_CHAR(tty));
-
        if (mask & UPSTAT_AUTORTS)
                uart_set_mctrl(port, TIOCM_RTS);
+
+       if (mask & UPSTAT_AUTOXOFF)
+               uart_send_xchar(tty, START_CHAR(tty));
 }
 
 static void uart_get_info(struct tty_port *port, struct serial_struct *retinfo)