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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>
This commit is contained in:
Peter Hurley 2016-01-10 20:24:02 -08:00 committed by Greg Kroah-Hartman
parent 968af29836
commit b4749b97ae
1 changed files with 6 additions and 6 deletions
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12
drivers/tty/serial/serial_core.c
View File

@ -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)