diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index c1767a0ce630..750e5f23406d 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -290,16 +290,16 @@ static int ifcvf_request_config_irq(struct ifcvf_adapter *adapter)
 	struct ifcvf_hw *vf = &adapter->vf;
 	int config_vector, ret;
 
-	if (vf->msix_vector_status == MSIX_VECTOR_DEV_SHARED)
-		return 0;
-
 	if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
-		/* vector 0 ~ vf->nr_vring for vqs, num vf->nr_vring vector for config interrupt */
 		config_vector = vf->nr_vring;
-
-	if (vf->msix_vector_status ==  MSIX_VECTOR_SHARED_VQ_AND_CONFIG)
+	else if (vf->msix_vector_status ==  MSIX_VECTOR_SHARED_VQ_AND_CONFIG)
 		/* vector 0 for vqs and 1 for config interrupt */
 		config_vector = 1;
+	else if (vf->msix_vector_status == MSIX_VECTOR_DEV_SHARED)
+		/* re-use the vqs vector */
+		return 0;
+	else
+		return -EINVAL;
 
 	snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
 		 pci_name(pdev));