TTY: call tty_port_destroy in the rest of drivers

After commit "TTY: move tty buffers to tty_port", the tty buffers are
not freed in some drivers. This is because tty_port_destructor is not
called whenever a tty_port is freed. This was an assumption I counted
with but was unfortunately untrue. So fix the drivers to fulfil this
assumption.

To be sure, the TTY buffers (and later some stuff) are gone along with
the tty_port, we have to call tty_port_destroy at tear-down places.
This is mostly where the structure containing a tty_port is freed.
This patch does exactly that -- put tty_port_destroy at those places.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 7e60f3d2f3f9..effcc8756e0a 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -615,6 +615,7 @@ static void __init __sclp_vt220_cleanup(void)
 		return;
 	sclp_unregister(&sclp_vt220_register);
 	__sclp_vt220_free_pages();
+	tty_port_destroy(&sclp_vt220_port);
 }
 
 /* Allocate buffer pages and register with sclp core. Controlled by init
@@ -650,6 +651,7 @@ out:
 	if (rc) {
 		__sclp_vt220_free_pages();
 		sclp_vt220_init_count--;
+		tty_port_destroy(&sclp_vt220_port);
 	}
 	return rc;
 }