Make the region->release() function optional as in some cases there is nothing to do by driver as part of it. This is needed for coming patch from this series once we add mlx5_vfio_pci driver to support live migration but we don't need a migration release function. Signed-off-by: Yishai Hadas <yishaih@xxxxxxxxxx> Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx> --- drivers/vfio/pci/vfio_pci_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index a03b5a99c2da..e581a327f90d 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -341,7 +341,8 @@ void vfio_pci_core_disable(struct vfio_pci_core_device *vdev) vdev->virq_disabled = false; for (i = 0; i < vdev->num_regions; i++) - vdev->region[i].ops->release(vdev, &vdev->region[i]); + if (vdev->region[i].ops->release) + vdev->region[i].ops->release(vdev, &vdev->region[i]); vdev->num_regions = 0; kfree(vdev->region); -- 2.18.1
