diff --git a/drivers/usb/gadget/function/f_mtp.c b/drivers/usb/gadget/function/f_mtp.c
index 451e380..ca8ed69 100644
--- a/drivers/usb/gadget/function/f_mtp.c
+++ b/drivers/usb/gadget/function/f_mtp.c
@@ -1826,6 +1826,8 @@
 	usb_os_desc_prepare_interf_dir(&fi_mtp->func_inst.group, 1,
 					descs, names, THIS_MODULE);
 
+	mutex_init(&fi_mtp->dev->read_mutex);
+
 	return  &fi_mtp->func_inst;
 }
 EXPORT_SYMBOL_GPL(alloc_inst_mtp_ptp);
@@ -1887,7 +1889,6 @@
 	dev->function.free_func = mtp_free;
 	fi->f = &dev->function;
 
-	mutex_init(&dev->read_mutex);
 	return &dev->function;
 }
 EXPORT_SYMBOL_GPL(function_alloc_mtp_ptp);