A number of PCI device drivers supporting SR-IOV use pci_vfs_assigned() to
check if there are any VF devices assigned by a VMM prior to disabling
SR-IOV (i.e. bnx2x, be2net, fm10k, i40e, igb, ixgbe, qlcnic). This check
works fine with the legacy device assignment (pci-stub enables the device)
which calls pci_set_dev_assigned(). The newer VFIO-based assignment
(vfio-pci enables device) doesn't call pci_set_dev_assigned() potentially
leading to issues in those drivers when disabling SR-IOV with VFs assigned.
Add calls to pci_[set|clear]_dev_assigned() to set the flag as expected.
Signed-off-by: Bruce Allan <bruce.w.allan@xxxxxxxxx>
---
drivers/vfio/pci/vfio_pci.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 69fab0f..3f368ce 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -956,6 +956,8 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return ret;
}
+ pci_set_dev_assigned(pdev);
+
if (vfio_pci_is_vga(pdev)) {
vga_client_register(pdev, vdev, NULL, vfio_pci_set_vga_decode);
vga_set_legacy_decoding(pdev,
@@ -990,6 +992,8 @@ static void vfio_pci_remove(struct pci_dev *pdev)
iommu_group_put(pdev->dev.iommu_group);
kfree(vdev);
+ pci_clear_dev_assigned(pdev);
+
if (vfio_pci_is_vga(pdev)) {
vga_client_register(pdev, NULL, NULL, NULL);
vga_set_legacy_decoding(pdev,
--
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