From: Andrzej Pietrasiewicz <[email protected]>

Add a method to unregister the gadget using its config_item.
Add a method to query the registered status using config_item.

There can be functions (e.g. mass storage), which in some circumstances
need the gadget stopped. Add a method of stopping the gadget.

Signed-off-by: Andrzej Pietrasiewicz <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
---
 drivers/usb/gadget/configfs.c |    8 ++++++++
 drivers/usb/gadget/configfs.h |    6 ++++++
 2 files changed, 14 insertions(+)
 create mode 100644 drivers/usb/gadget/configfs.h

diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index 80e7f75..cda3ead 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -989,6 +989,14 @@ static struct configfs_subsystem gadget_subsys = {
        .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex),
 };
 
+void unregister_gadget_item(struct config_item *item)
+{
+       struct gadget_info *gi = to_gadget_info(item);
+
+       unregister_gadget(gi);
+}
+EXPORT_SYMBOL(unregister_gadget_item);
+
 static int __init gadget_cfs_init(void)
 {
        int ret;
diff --git a/drivers/usb/gadget/configfs.h b/drivers/usb/gadget/configfs.h
new file mode 100644
index 0000000..a7b564a
--- /dev/null
+++ b/drivers/usb/gadget/configfs.h
@@ -0,0 +1,6 @@
+#ifndef USB__GADGET__CONFIGFS__H
+#define USB__GADGET__CONFIGFS__H
+
+void unregister_gadget_item(struct config_item *item);
+
+#endif /*  USB__GADGET__CONFIGFS__H */
-- 
1.7.9.5

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