diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 904c66128fae..f30807e7697b 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1572,6 +1572,8 @@ static struct device_attribute vio_dev_attrs[] = {
 void vio_unregister_device(struct vio_dev *viodev)
 {
 	device_unregister(&viodev->dev);
+	if (viodev->family == VDEVICE)
+		irq_dispose_mapping(viodev->irq);
 }
 EXPORT_SYMBOL(vio_unregister_device);