From c93a97ee0583cd65adaf872e7cc402493eae92a7 Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Mon, 26 Sep 2016 13:52:19 -0600 Subject: 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 --- drivers/vfio/pci/vfio_pci_intrs.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/vfio/pci/vfio_pci_intrs.c') diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index 152b43822ef1..aa23e9a4a22f 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -414,6 +414,13 @@ static void vfio_msi_disable(struct vfio_pci_device *vdev, bool msix) } 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); -- cgit v1.2.3