diff options
Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index de9111d97a5..92200f05b53 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -168,6 +168,11 @@ static void destroy_serial(struct kref *kref) kfree (serial); } +void usb_serial_put(struct usb_serial *serial) +{ + kref_put(&serial->kref, destroy_serial); +} + /***************************************************************************** * Driver tty interface functions *****************************************************************************/ @@ -232,7 +237,7 @@ bailout_mutex_unlock: port->open_count = 0; mutex_unlock(&port->mutex); bailout_kref_put: - kref_put(&serial->kref, destroy_serial); + usb_serial_put(serial); return retval; } @@ -268,7 +273,7 @@ static void serial_close(struct tty_struct *tty, struct file * filp) } mutex_unlock(&port->mutex); - kref_put(&port->serial->kref, destroy_serial); + usb_serial_put(port->serial); } static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) @@ -276,7 +281,7 @@ static int serial_write (struct tty_struct * tty, const unsigned char *buf, int struct usb_serial_port *port = tty->driver_data; int retval = -EINVAL; - if (!port) + if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) goto exit; dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); @@ -473,7 +478,7 @@ static int serial_read_proc (char *page, char **start, off_t off, int count, int begin += length; length = 0; } - kref_put(&serial->kref, destroy_serial); + usb_serial_put(serial); } *eof = 1; done: @@ -985,6 +990,7 @@ void usb_serial_disconnect(struct usb_interface *interface) struct device *dev = &interface->dev; struct usb_serial_port *port; + usb_serial_console_disconnect(serial); dbg ("%s", __FUNCTION__); usb_set_intfdata (interface, NULL); @@ -996,7 +1002,7 @@ void usb_serial_disconnect(struct usb_interface *interface) } /* let the last holder of this object * cause it to be cleaned up */ - kref_put(&serial->kref, destroy_serial); + usb_serial_put(serial); } dev_info(dev, "device disconnected\n"); } |