diff --git a/drivers/usb/gadget/android.c b/drivers/usb/gadget/android.c
index a7f49a7dd017..aa1f85d75dee 100644
--- a/drivers/usb/gadget/android.c
+++ b/drivers/usb/gadget/android.c
@@ -514,11 +514,14 @@ static void functionfs_closed_callback(struct ffs_data *ffs)
 	mutex_unlock(&dev->mutex);
 }
 
-static int functionfs_check_dev_callback(const char *dev_name)
+static void *functionfs_acquire_dev_callback(const char *dev_name)
 {
 	return 0;
 }
 
+static void functionfs_release_dev_callback(struct ffs_data *ffs_data)
+{
+}
 
 struct adb_data {
 	bool opened;