diff options
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index aafa684a900..8d518909647 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -339,6 +339,10 @@ static int serial_chars_in_buffer(struct tty_struct *tty) dbg("%s = port %d", __func__, port->number); WARN_ON(!port->port.count); + /* if the device was unplugged then any remaining characters + fell out of the connector ;) */ + if (port->serial->disconnected) + return 0; /* pass on to the driver specific version of this function */ return port->serial->type->chars_in_buffer(tty); } |