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tty: serial: Fix termios/port flags mismatch

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Uart port drivers may reconfigure termios settings based on available
hardware support; set/clear ASYNC_CTS_FLOW and ASYNC_CHECK_CD _after_
calling the port driver's .set_termios method.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2014-06-16 09:17:09 -04:00 committed by Greg Kroah-Hartman
parent 7c6d340f4f
commit c18b55fd17
1 changed files with 3 additions and 2 deletions
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5
drivers/tty/serial/serial_core.c
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@ -450,6 +450,7 @@ static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
return;
termios = &tty->termios;
uport->ops->set_termios(uport, termios, old_termios);
/*
* Set flags based on termios cflag
@ -463,8 +464,6 @@ static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
clear_bit(ASYNCB_CHECK_CD, &port->flags);
else
set_bit(ASYNCB_CHECK_CD, &port->flags);
uport->ops->set_termios(uport, termios, old_termios);
}
static inline int __uart_put_char(struct uart_port *port,
@ -1282,6 +1281,8 @@ static void uart_set_termios(struct tty_struct *tty,
}
uart_change_speed(tty, state, old_termios);
/* reload cflag from termios; port driver may have overriden flags */
cflag = tty->termios.c_cflag;
/* Handle transition to B0 status */
if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD))