diff options
Diffstat (limited to 'drivers/usb/serial/mct_u232.c')
| -rw-r--r-- | drivers/usb/serial/mct_u232.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c index d8825e159aa5..ad4998bbf16f 100644 --- a/drivers/usb/serial/mct_u232.c +++ b/drivers/usb/serial/mct_u232.c @@ -93,8 +93,7 @@ static int debug; */ static int mct_u232_startup(struct usb_serial *serial); static void mct_u232_release(struct usb_serial *serial); -static int mct_u232_open(struct tty_struct *tty, - struct usb_serial_port *port, struct file *filp); +static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port); static void mct_u232_close(struct usb_serial_port *port); static void mct_u232_dtr_rts(struct usb_serial_port *port, int on); static void mct_u232_read_int_callback(struct urb *urb); @@ -421,8 +420,7 @@ static void mct_u232_release(struct usb_serial *serial) } } /* mct_u232_release */ -static int mct_u232_open(struct tty_struct *tty, - struct usb_serial_port *port, struct file *filp) +static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port) { struct usb_serial *serial = port->serial; struct mct_u232_private *priv = usb_get_serial_port_data(port); @@ -568,10 +566,13 @@ static void mct_u232_read_int_callback(struct urb *urb) * Work-a-round: handle the 'usual' bulk-in pipe here */ if (urb->transfer_buffer_length > 2) { - tty = tty_port_tty_get(&port->port); if (urb->actual_length) { - tty_insert_flip_string(tty, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty = tty_port_tty_get(&port->port); + if (tty) { + tty_insert_flip_string(tty, data, + urb->actual_length); + tty_flip_buffer_push(tty); + } tty_kref_put(tty); } goto exit; |