It does not make the driver less racy though. Close and hangup should
be rewritten and tty refcounting used properly.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Acked-by: NDavid Sterba <dsterba@suse.cz>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>