TTY: add tty_port_tty_hangup helper

It allows for cleaning up on a considerable amount of places. They did
port_get, hangup, kref_put. Now the only thing needed is to call
tty_port_tty_hangup which does exactly that. And they can also decide
whether to consider CLOCAL or completely ignore that.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 8 deletions

diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index 345bd0e0884e..33f83fee9fae 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -1124,14 +1124,8 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
                                         readl(&info->u.cyz.ch_ctrl->rs_status);
                                 if (dcd & C_RS_DCD)
                                         wake_up_interruptible(&info->port.open_wait);
-                                else {
-                                        struct tty_struct *tty;
-                                        tty = tty_port_tty_get(&info->port);
-                                        if (tty) {
-                                                tty_hangup(tty);
-                                                tty_kref_put(tty);
-                                        }
-                                }
+                                else
+                                        tty_port_tty_hangup(&info->port, false);
                         }
                         break;
                 case C_CM_MCTS: