tty: Pull the dtr raise into tty port

This moves another per device special out of what should be shared open
wait paths into private methods

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index f54e40cbf023..0557b6384747 100644
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -111,3 +111,19 @@ int tty_port_carrier_raised(struct tty_port *port)
         return port->ops->carrier_raised(port);
 }
 EXPORT_SYMBOL(tty_port_carrier_raised);
+
+/**
+ *      tty_port_raise_dtr_rts  -       Riase 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_raise_dtr_rts(struct tty_port *port)
+{
+        if (port->ops->raise_dtr_rts)
+                port->ops->raise_dtr_rts(port);
+}
+EXPORT_SYMBOL(tty_port_raise_dtr_rts);