vfio-pci: Disable INTx after MSI/X teardown
The MSI/X shutdown path can gratuitously enable INTx, which is not
something we want to happen if we're dealing with broken INTx device.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
index 152b438..aa23e9a 100644
--- a/drivers/vfio/pci/vfio_pci_intrs.c
+++ b/drivers/vfio/pci/vfio_pci_intrs.c
@@ -414,6 +414,13 @@
} else
pci_disable_msi(pdev);
+ /*
+ * Both disable paths above use pci_intx_for_msi() to clear DisINTx
+ * via their shutdown paths. Restore for NoINTx devices.
+ */
+ if (vdev->nointx)
+ pci_intx(pdev, 0);
+
vdev->irq_type = VFIO_PCI_NUM_IRQS;
vdev->num_ctx = 0;
kfree(vdev->ctx);