diff --git a/drivers/usb/phy/phy-fsm-usb.c b/drivers/usb/phy/phy-fsm-usb.c
index 62238726fb1c..65c3a728ef4f 100644
--- a/drivers/usb/phy/phy-fsm-usb.c
+++ b/drivers/usb/phy/phy-fsm-usb.c
@@ -357,7 +357,7 @@ int otg_statemachine(struct otg_fsm *fsm)
 	default:
 		break;
 	}
-	mutex_lock(&fsm->lock);
+	mutex_unlock(&fsm->lock);
 
 	VDBG("quit statemachine, changed = %d\n", state_changed);
 	return state_changed;