From: Alex Williamson <alex.williamson@redhat.com>
Date: Tue, 24 Mar 2020 09:28:29 -0600
Subject: vfio/pci: Cleanup .probe() exit paths
Git-commit: b66574a3fb32e2bac5bf3589dae6d335b7a70689
Patch-mainline: v5.7-rc1
References: bsc#1175713

The cleanup is getting a tad long.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/vfio/pci/vfio_pci.c | 54 +++++++++++++++++++++------------------------
 1 file changed, 25 insertions(+), 29 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index af1ba9867201..6c6b37b5c04e 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -1598,8 +1598,8 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
 	if (!vdev) {
-		vfio_iommu_group_put(group, &pdev->dev);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out_group_put;
 	}
 
 	vdev->pdev = pdev;
@@ -1610,43 +1610,27 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	INIT_LIST_HEAD(&vdev->ioeventfds_list);
 
 	ret = vfio_add_group_dev(&pdev->dev, &vfio_pci_ops, vdev);
-	if (ret) {
-		vfio_iommu_group_put(group, &pdev->dev);
-		kfree(vdev);
-		return ret;
-	}
+	if (ret)
+		goto out_free;
 
 	ret = vfio_pci_reflck_attach(vdev);
-	if (ret) {
-		vfio_del_group_dev(&pdev->dev);
-		vfio_iommu_group_put(group, &pdev->dev);
-		kfree(vdev);
-		return ret;
-	}
+	if (ret)
+		goto out_del_group_dev;
 
 	if (pdev->is_physfn) {
 		vdev->vf_token = kzalloc(sizeof(*vdev->vf_token), GFP_KERNEL);
 		if (!vdev->vf_token) {
-			vfio_pci_reflck_put(vdev->reflck);
-			vfio_del_group_dev(&pdev->dev);
-			vfio_iommu_group_put(group, &pdev->dev);
-			kfree(vdev);
-			return -ENOMEM;
-		}
-
-		vdev->nb.notifier_call = vfio_pci_bus_notifier;
-		ret = bus_register_notifier(&pci_bus_type, &vdev->nb);
-		if (ret) {
-			kfree(vdev->vf_token);
-			vfio_pci_reflck_put(vdev->reflck);
-			vfio_del_group_dev(&pdev->dev);
-			vfio_iommu_group_put(group, &pdev->dev);
-			kfree(vdev);
-			return ret;
+			ret = -ENOMEM;
+			goto out_reflck;
 		}
 
 		mutex_init(&vdev->vf_token->lock);
 		uuid_gen(&vdev->vf_token->uuid);
+
+		vdev->nb.notifier_call = vfio_pci_bus_notifier;
+		ret = bus_register_notifier(&pci_bus_type, &vdev->nb);
+		if (ret)
+			goto out_vf_token;
 	}
 
 	if (vfio_pci_is_vga(pdev)) {
@@ -1672,6 +1656,18 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	}
 
 	return ret;
+
+out_vf_token:
+	kfree(vdev->vf_token);
+out_reflck:
+	vfio_pci_reflck_put(vdev->reflck);
+out_del_group_dev:
+	vfio_del_group_dev(&pdev->dev);
+out_free:
+	kfree(vdev);
+out_group_put:
+	vfio_iommu_group_put(group, &pdev->dev);
+	return ret;
 }
 
 static void vfio_pci_remove(struct pci_dev *pdev)