From d87d9b7d19f04b16c4406d3c0feeca10090e0ada Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 1 Jun 2010 22:52:53 +0200 Subject: [PATCH] tty: serial - fix tty referencing in set_ldisc Pass down the ldisc number so that the drivers don't have to peek into the tty object themselves. This lets us get rid of another case of back referencing port to tty which we don't want (because of races versus hangup/close). Signed-off-by: Alan Cox Cc: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/serial/bfin_5xx.c | 7 ++----- drivers/serial/serial_core.c | 2 +- include/linux/serial_core.h | 2 +- 3 files changed, 4 insertions(+), 7 deletions(-) diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index 511cbf687877..a9eff2b18eab 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -957,15 +957,12 @@ bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser) * Enable the IrDA function if tty->ldisc.num is N_IRDA. * In other cases, disable IrDA function. */ -static void bfin_serial_set_ldisc(struct uart_port *port) +static void bfin_serial_set_ldisc(struct uart_port *port, int ld) { int line = port->line; unsigned short val; - if (line >= port->state->port.tty->driver->num) - return; - - switch (port->state->port.tty->termios->c_line) { + switch (ld) { case N_IRDA: val = UART_GET_GCTL(&bfin_serial_ports[line]); val |= (IREN | RPOLC); diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 12ee7e0f99ce..570dca2935e2 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -1194,7 +1194,7 @@ static void uart_set_ldisc(struct tty_struct *tty) struct uart_port *uport = state->uart_port; if (uport->ops->set_ldisc) - uport->ops->set_ldisc(uport); + uport->ops->set_ldisc(uport, tty->termios->c_line); } static void uart_set_termios(struct tty_struct *tty, diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index f10db6e5f3b5..32928161fab6 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -220,7 +220,7 @@ struct uart_ops { void (*flush_buffer)(struct uart_port *); void (*set_termios)(struct uart_port *, struct ktermios *new, struct ktermios *old); - void (*set_ldisc)(struct uart_port *); + void (*set_ldisc)(struct uart_port *, int new); void (*pm)(struct uart_port *, unsigned int state, unsigned int oldstate); int (*set_wake)(struct uart_port *, unsigned int state); -- 2.39.5