USB: gadget: composite: added disconnect callback

Added a disconnect() callback to composite devices which
is called by composite glue when its disconnect callback
is called by gadget.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 125167e17ce5..e483f80822d2 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -956,6 +956,8 @@ static void composite_disconnect(struct usb_gadget *gadget)
         spin_lock_irqsave(&cdev->lock, flags);
         if (cdev->config)
                 reset_config(cdev);
+        if (composite->disconnect)
+                composite->disconnect(cdev);
         spin_unlock_irqrestore(&cdev->lock, flags);
 }
 
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index f378075c839a..890bc1472190 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -276,6 +276,8 @@ struct usb_composite_driver {
         int                     (*bind)(struct usb_composite_dev *);
         int                     (*unbind)(struct usb_composite_dev *);
 
+        void                    (*disconnect)(struct usb_composite_dev *);
+
         /* global suspend hooks */
         void                    (*suspend)(struct usb_composite_dev *);
         void                    (*resume)(struct usb_composite_dev *);