1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index b817809f763c..e09dc8a5e743 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1849,6 +1849,8 @@ err_unregister:
                 kfree(info->fax);
 #endif
                 kfree(info->port.xmit_buf - 4);
+                info->port.xmit_buf = NULL;
+                tty_port_destroy(&info->port);
         }
         tty_unregister_driver(m->tty_modem);
 err:
@@ -1870,6 +1872,8 @@ isdn_tty_exit(void)
                 kfree(info->fax);
 #endif
                 kfree(info->port.xmit_buf - 4);
+                info->port.xmit_buf = NULL;
+                tty_port_destroy(&info->port);
         }
         tty_unregister_driver(dev->mdm.tty_modem);
         put_tty_driver(dev->mdm.tty_modem);