usb: gadget: FunctionFS: clear FFS_FL_BOUND flag on unbind (bugfix)

clear FFS_FL_BOUND flag on unbind (bugfix)

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index 1cbba70..d187ae7 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -1382,6 +1382,7 @@
 		ffs->ep0req = NULL;
 		ffs->gadget = NULL;
 		ffs_data_put(ffs);
+		clear_bit(FFS_FL_BOUND, &ffs->flags);
 	}
 }