Linux-libre 4.2-gnu

1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index e9851add6..964ad572a 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -1056,19 +1056,21 @@ struct vfio_devices {
 static int vfio_pci_get_devs(struct pci_dev *pdev, void *data)
 {
 	struct vfio_devices *devs = data;
-	struct pci_driver *pci_drv = ACCESS_ONCE(pdev->driver);
-
-	if (pci_drv != &vfio_pci_driver)
-		return -EBUSY;
+	struct vfio_device *device;
 
 	if (devs->cur_index == devs->max_index)
 		return -ENOSPC;
 
-	devs->devices[devs->cur_index] = vfio_device_get_from_dev(&pdev->dev);
-	if (!devs->devices[devs->cur_index])
+	device = vfio_device_get_from_dev(&pdev->dev);
+	if (!device)
 		return -EINVAL;
 
-	devs->cur_index++;
+	if (pci_dev_driver(pdev) != &vfio_pci_driver) {
+		vfio_device_put(device);
+		return -EBUSY;
+	}
+
+	devs->devices[devs->cur_index++] = device;
 	return 0;
 }