diff options
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index d35371c076b2..cc866da50b81 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2638,7 +2638,8 @@ static int uart_poll_init(struct tty_driver *driver, int line, char *options) mutex_lock(&tport->mutex); port = uart_port_check(state); - if (!port || !(port->ops->poll_get_char && port->ops->poll_put_char)) { + if (!port || port->type == PORT_UNKNOWN || + !(port->ops->poll_get_char && port->ops->poll_put_char)) { ret = -1; goto out; } |