tty: Add carrier processing on close to the tty_port core

[safe/jmp/linux-2.6] / drivers / char / tty_port.c

diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index 9b8004c..926d4a5 100644 (file)
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -137,7 +137,7 @@ int tty_port_carrier_raised(struct tty_port *port)
 EXPORT_SYMBOL(tty_port_carrier_raised);
 
 /**
- *     tty_port_raise_dtr_rts  -       Riase DTR/RTS
+ *     tty_port_raise_dtr_rts  -       Raise DTR/RTS
  *     @port: tty port
  *
  *     Wrapper for the DTR/RTS raise logic. For the moment this is used
@@ -147,12 +147,28 @@ EXPORT_SYMBOL(tty_port_carrier_raised);
 
 void tty_port_raise_dtr_rts(struct tty_port *port)
 {
-       if (port->ops->raise_dtr_rts)
-               port->ops->raise_dtr_rts(port);
+       if (port->ops->dtr_rts)
+               port->ops->dtr_rts(port, 1);
 }
 EXPORT_SYMBOL(tty_port_raise_dtr_rts);
 
 /**
+ *     tty_port_lower_dtr_rts  -       Lower DTR/RTS
+ *     @port: tty port
+ *
+ *     Wrapper for the DTR/RTS raise logic. For the moment this is used
+ *     to hide some internal details. This will eventually become entirely
+ *     internal to the tty port.
+ */
+
+void tty_port_lower_dtr_rts(struct tty_port *port)
+{
+       if (port->ops->dtr_rts)
+               port->ops->dtr_rts(port, 0);
+}
+EXPORT_SYMBOL(tty_port_lower_dtr_rts);
+
+/**
  *     tty_port_block_til_ready        -       Waiting logic for tty open
  *     @port: the tty port being opened
  *     @tty: the tty device being bound
@@ -167,7 +183,7 @@ EXPORT_SYMBOL(tty_port_raise_dtr_rts);
  *             - port flags and counts
  *
  *     The passed tty_port must implement the carrier_raised method if it can
- *     do carrier detect and the raise_dtr_rts method if it supports software
+ *     do carrier detect and the dtr_rts method if it supports software
  *     management of these lines. Note that the dtr/rts raise is done each
  *     iteration as a hangup may have previously dropped them while we wait.
  */
@@ -302,6 +318,9 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
 
        tty_ldisc_flush(tty);
 
+       if (tty->termios->c_cflag & HUPCL)
+               tty_port_lower_dtr_rts(port);
+
        spin_lock_irqsave(&port->lock, flags);
        tty->closing = 0;