diff options
| -rw-r--r-- | drivers/tty/mxser.c | 4 | ||||
| -rw-r--r-- | drivers/tty/n_gsm.c | 4 | ||||
| -rw-r--r-- | drivers/tty/tty_port.c | 27 |
3 files changed, 23 insertions, 12 deletions
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 484b6a3c9b03..d996038eacfd 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -1084,6 +1084,10 @@ static void mxser_close(struct tty_struct *tty, struct file *filp) mutex_lock(&port->mutex); mxser_close_port(port); mxser_flush_buffer(tty); + if (test_bit(ASYNCB_INITIALIZED, &port->flags)) { + if (C_HUPCL(tty)) + tty_port_lower_dtr_rts(port); + } mxser_shutdown_port(port); clear_bit(ASYNCB_INITIALIZED, &port->flags); mutex_unlock(&port->mutex); diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 74d9a0258d7c..642239015b46 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2964,6 +2964,10 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp) if (tty_port_close_start(&dlci->port, tty, filp) == 0) goto out; gsm_dlci_begin_close(dlci); + if (test_bit(ASYNCB_INITIALIZED, &dlci->port.flags)) { + if (C_HUPCL(tty)) + tty_port_lower_dtr_rts(&dlci->port); + } tty_port_close_end(&dlci->port, tty); tty_port_tty_set(&dlci->port, NULL); out: diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 7e3eaf4eb9fe..0af8d9aa5b02 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -196,13 +196,20 @@ void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty) } EXPORT_SYMBOL(tty_port_tty_set); -static void tty_port_shutdown(struct tty_port *port) +static void tty_port_shutdown(struct tty_port *port, struct tty_struct *tty) { mutex_lock(&port->mutex); if (port->console) goto out; if (test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags)) { + /* + * Drop DTR/RTS if HUPCL is set. This causes any attached + * modem to hang up the line. + */ + if (tty && C_HUPCL(tty)) + tty_port_lower_dtr_rts(port); + if (port->ops->shutdown) port->ops->shutdown(port); } @@ -220,18 +227,19 @@ out: void tty_port_hangup(struct tty_port *port) { + struct tty_struct *tty; unsigned long flags; spin_lock_irqsave(&port->lock, flags); port->count = 0; port->flags &= ~ASYNC_NORMAL_ACTIVE; - if (port->tty) { - set_bit(TTY_IO_ERROR, &port->tty->flags); - tty_kref_put(port->tty); - } + tty = port->tty; + if (tty) + set_bit(TTY_IO_ERROR, &tty->flags); port->tty = NULL; spin_unlock_irqrestore(&port->lock, flags); - tty_port_shutdown(port); + tty_port_shutdown(port, tty); + tty_kref_put(tty); wake_up_interruptible(&port->open_wait); wake_up_interruptible(&port->delta_msr_wait); } @@ -485,11 +493,6 @@ int tty_port_close_start(struct tty_port *port, /* Flush the ldisc buffering */ tty_ldisc_flush(tty); - /* Drop DTR/RTS if HUPCL is set. This causes any attached modem to - hang up the line */ - if (tty->termios.c_cflag & HUPCL) - tty_port_lower_dtr_rts(port); - /* Don't call port->drop for the last reference. Callers will want to drop the last active reference in ->shutdown() or the tty shutdown path */ @@ -524,7 +527,7 @@ void tty_port_close(struct tty_port *port, struct tty_struct *tty, { if (tty_port_close_start(port, tty, filp) == 0) return; - tty_port_shutdown(port); + tty_port_shutdown(port, tty); set_bit(TTY_IO_ERROR, &tty->flags); tty_port_close_end(port, tty); tty_port_tty_set(port, NULL); |