commit 9a8e62bc68832dc55a5e6868f812b65567fe66b5
author Jiri Slaby <jslaby@suse.cz> Thu Nov 15 09:49:53 2012 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Thu Nov 15 17:20:57 2012 -0800
tree d02424332c1274547295d87c30b16aec920b455e
parent e70c67713cdabf55e05db7f1c4fc38085da333a5

TTY: n_gsm, use kref from tty_port

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.

Here it is enough to switch to refcounting in tty_port.

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