diff --git a/drivers/usb/gadget/f_ecm.c b/drivers/usb/gadget/f_ecm.c
index fcafe1af45850f5ee3d9906efb91d4beefcccefd..5d3561ea1c1595ea30f07bc3ad35253647701d97 100644
--- a/drivers/usb/gadget/f_ecm.c
+++ b/drivers/usb/gadget/f_ecm.c
@@ -1012,6 +1012,7 @@ struct usb_function *ecm_alloc(struct usb_function_instance *fi)
 					  sizeof(ecm->ethaddr));
 	if (status < 12) {
 		kfree(ecm);
+		mutex_unlock(&opts->lock);
 		return ERR_PTR(-EINVAL);
 	}
 	ecm_string_defs[1].s = ecm->ethaddr;