3 files changed, 2 insertions, 9 deletions

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index a6d0ac638e0a..4d421f3f8a7c 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -45,7 +45,6 @@ struct usb_serial_driver usb_serial_generic_device = {
         },
         .id_table =             generic_device_ids,
         .num_ports =            1,
-        .disconnect =           usb_serial_generic_disconnect,
         .release =              usb_serial_generic_release,
         .throttle =             usb_serial_generic_throttle,
         .unthrottle =           usb_serial_generic_unthrottle,
@@ -500,11 +499,6 @@ int usb_serial_generic_resume(struct usb_serial *serial)
 }
 EXPORT_SYMBOL_GPL(usb_serial_generic_resume);
 
-void usb_serial_generic_disconnect(struct usb_serial *serial)
-{
-}
-EXPORT_SYMBOL_GPL(usb_serial_generic_disconnect);
-
 void usb_serial_generic_release(struct usb_serial *serial)
 {
 }
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index e7f97b58e914..569b6792c218 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1095,7 +1095,8 @@ static void usb_serial_disconnect(struct usb_interface *interface)
                                 device_del(&port->dev);
                 }
         }
-        serial->type->disconnect(serial);
+        if (serial->type->disconnect)
+                serial->type->disconnect(serial);
 
         /* let the last holder of this object cause it to be cleaned up */
         usb_serial_put(serial);
@@ -1304,7 +1305,6 @@ static void fixup_generic(struct usb_serial_driver *device)
         set_to_generic_if_null(device, chars_in_buffer);
         set_to_generic_if_null(device, read_bulk_callback);
         set_to_generic_if_null(device, write_bulk_callback);
-        set_to_generic_if_null(device, disconnect);
         set_to_generic_if_null(device, release);
         set_to_generic_if_null(device, process_read_urb);
         set_to_generic_if_null(device, prepare_write_buffer);
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 1819b59aab2a..437dfd6787f9 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -329,7 +329,6 @@ extern void usb_serial_generic_read_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_write_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_throttle(struct tty_struct *tty);
 extern void usb_serial_generic_unthrottle(struct tty_struct *tty);
-extern void usb_serial_generic_disconnect(struct usb_serial *serial);
 extern void usb_serial_generic_release(struct usb_serial *serial);
 extern int usb_serial_generic_register(void);
 extern void usb_serial_generic_deregister(void);