diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/tty_port.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index f597e88a705d..7efbca474689 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -140,6 +140,10 @@ EXPORT_SYMBOL(tty_port_destroy); static void tty_port_destructor(struct kref *kref) { struct tty_port *port = container_of(kref, struct tty_port, kref); + + /* check if last port ref was dropped before tty release */ + if (WARN_ON(port->itty)) + return; if (port->xmit_buf) free_page((unsigned long)port->xmit_buf); tty_port_destroy(port); |