diff --git a/drivers/mailbox/arm_mhu_db.c b/drivers/mailbox/arm_mhu_db.c
index a39239e38a47..9f1c7bcfdcb4 100644
--- a/drivers/mailbox/arm_mhu_db.c
+++ b/drivers/mailbox/arm_mhu_db.c
@@ -317,10 +317,8 @@ static int mhu_db_probe(struct amba_device *adev, const struct amba_id *id)
 		err = devm_request_threaded_irq(dev, irq, NULL,
 						mhu_db_mbox_rx_handler,
 						IRQF_ONESHOT, "mhu_db_link", mhu);
-		if (err) {
-			mbox_controller_unregister(&mhu->mbox);
+		if (err)
 			return err;
-		}
 	}
 
 	dev_info(dev, "ARM MHU Doorbell mailbox registered\n");