s390/3270: readd tty3270_open
Reintroduce the tty3270_open function which has been removed by
git commit 20cda6f2 "TTY: tty3270, add tty install". Without
the open function in the tty_operations tty_open will return
-ENODEV and the 3270 tty will not work.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 43ea059..9640184 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -926,6 +926,20 @@
}
/*
+ * This routine is called whenever a 3270 tty is opened.
+ */
+static int
+tty3270_open(struct tty_struct *tty, struct file *filp)
+{
+ struct tty3270 *tp = tty->driver_data;
+ struct tty_port *port = &tp->port;
+
+ port->count++;
+ tty_port_tty_set(port, tty);
+ return 0;
+}
+
+/*
* This routine is called when the 3270 tty is closed. We wait
* for the remaining request to be completed. Then we clean up.
*/
@@ -1753,6 +1767,7 @@
static const struct tty_operations tty3270_ops = {
.install = tty3270_install,
.cleanup = tty3270_cleanup,
+ .open = tty3270_open,
.close = tty3270_close,
.write = tty3270_write,
.put_char = tty3270_put_char,
