diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index b03cb7ae7fd38..e9c3f1e826baa 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -2452,7 +2452,8 @@ static int vmbus_acpi_add(struct acpi_device *device)
 	 * Some ancestor of the vmbus acpi device (Gen1 or Gen2
 	 * firmware) is the VMOD that has the mmio ranges. Get that.
 	 */
-	for (ancestor = acpi_dev_parent(device); ancestor;
+	for (ancestor = acpi_dev_parent(device);
+	     ancestor && ancestor->handle != ACPI_ROOT_OBJECT;
 	     ancestor = acpi_dev_parent(ancestor)) {
 		result = acpi_walk_resources(ancestor->handle, METHOD_NAME__CRS,
 					     vmbus_walk_resources, NULL);