diff options
Diffstat (limited to 'drivers/usb/serial/sierra.c')
| -rw-r--r-- | drivers/usb/serial/sierra.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index 6aeea40081c..fcec4660355 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -594,14 +594,17 @@ static void sierra_indat_callback(struct urb *urb) } else { if (urb->actual_length) { tty = tty_port_tty_get(&port->port); - - tty_buffer_request_room(tty, urb->actual_length); - tty_insert_flip_string(tty, data, urb->actual_length); - tty_flip_buffer_push(tty); - - tty_kref_put(tty); - usb_serial_debug_data(debug, &port->dev, __func__, - urb->actual_length, data); + if (tty) { + tty_buffer_request_room(tty, + urb->actual_length); + tty_insert_flip_string(tty, data, + urb->actual_length); + tty_flip_buffer_push(tty); + + tty_kref_put(tty); + usb_serial_debug_data(debug, &port->dev, + __func__, urb->actual_length, data); + } } else { dev_dbg(&port->dev, "%s: empty read urb" " received\n", __func__); |