serial: core, remove uart_update_termios

Now, uart_update_termios is empty, so it's time to remove it. We no
longer need a live tty in .dtr_rts. So this should prune all the bugs
where tty is zeroed in port->tty during tty_port_block_til_ready.

There is one thing to note. We don't set ASYNC_NORMAL_ACTIVE now. It's
because this is done already in tty_port_block_til_ready.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 24 deletions

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 3aae8ed2a8f5..d4bd465c4c41 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1470,21 +1470,6 @@ static void uart_hangup(struct tty_struct *tty)
         mutex_unlock(&port->mutex);
 }
 
-/**
- *      uart_update_termios     -       update the terminal hw settings
- *      @tty: tty associated with UART
- *      @state: UART to update
- *
- *      Copy across the serial console cflag setting into the termios settings
- *      for the initial open of the port.  This allows continuity between the
- *      kernel settings, and the settings init adopts when it opens the port
- *      for the first time.
- */
-static void uart_update_termios(struct tty_struct *tty,
-                                                struct uart_state *state)
-{
-}
-
 static int uart_carrier_raised(struct tty_port *port)
 {
         struct uart_state *state = container_of(port, struct uart_state, port);
@@ -1504,16 +1489,8 @@ static void uart_dtr_rts(struct tty_port *port, int onoff)
         struct uart_state *state = container_of(port, struct uart_state, port);
         struct uart_port *uport = state->uart_port;
 
-        if (onoff) {
+        if (onoff)
                 uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
-
-                /*
-                 * If this is the first open to succeed,
-                 * adjust things to suit.
-                 */
-                if (!test_and_set_bit(ASYNCB_NORMAL_ACTIVE, &port->flags))
-                        uart_update_termios(port->tty, state);
-        }
         else
                 uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
 }