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serial: core, do not set DTR/RTS twice on startup 

In .dtr_rts we do:
  uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS)
and call uart_update_termios. It does:
  uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS)
once again. As the only callsite of uart_update_termios is .dtr_rts,
remove the uart_set_mctrl from uart_update_termios to not set it twice.

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>
This commit is contained in:
Jiri Slaby 2011-03-30 00:10:56 +02:00 committed by Greg Kroah-Hartman
parent c7d7abff40
commit 303a7a1199
1 changed files with 0 additions and 14 deletions
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14
drivers/tty/serial/serial_core.c
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@ -1483,20 +1483,6 @@ static void uart_hangup(struct tty_struct *tty)
static void uart_update_termios(struct tty_struct *tty, static void uart_update_termios(struct tty_struct *tty,
struct uart_state *state) struct uart_state *state)
{ {
struct uart_port *port = state->uart_port;
/*
* If the device failed to grab its irq resources,
* or some other error occurred, don't try to talk
* to the port hardware.
*/
if (!(tty->flags & (1 << TTY_IO_ERROR))) {
/*
* And finally enable the RTS and DTR signals.
*/
if (tty->termios->c_cflag & CBAUD)
uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
}
} }
static int uart_carrier_raised(struct tty_port *port) static int uart_carrier_raised(struct tty_port *port)