diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index a9d25b3395724dcc239588805e4e3dbb099dfa01..42612e193a00b08cd95689d70eecc98b9a68f6cd 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -502,8 +502,12 @@ static int vfio_pci_dma_fault_init(struct vfio_pci_device *vdev)
 		return 0;
 
 	ret = iommu_domain_get_attr(domain, DOMAIN_ATTR_NESTING, &nested);
-	if (ret || !nested)
-		return ret;
+	if (ret || !nested) {
+		if (ret)
+			pr_warn("%s: Get DOMAIN_ATTR_NESTING failed: %d.\n",
+				__func__, ret);
+		return 0;
+	}
 
 	mutex_init(&vdev->fault_queue_lock);
 
@@ -592,8 +596,12 @@ static int vfio_pci_dma_fault_response_init(struct vfio_pci_device *vdev)
 		return 0;
 
 	ret = iommu_domain_get_attr(domain, DOMAIN_ATTR_NESTING, &nested);
-	if (ret || !nested)
-		return ret;
+	if (ret || !nested) {
+		if (ret)
+			pr_warn("%s: Get DOMAIN_ATTR_NESTING failed: %d.\n",
+				__func__, ret);
+		return 0;
+	}
 
 	mutex_init(&vdev->fault_response_queue_lock);