From: Peter Hurley Date: Mon, 16 Jun 2014 13:17:09 +0000 (-0400) Subject: tty: serial: Fix termios/port flags mismatch X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c18b55fd1717a4c08c9f3555be63da142767e6b8;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git tty: serial: Fix termios/port flags mismatch 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 1a5fbf7ab347..b70095e55df6 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -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))