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authorAlex Williamson <alex.williamson@redhat.com>2016-09-26 13:52:19 -0600
committerAlex Williamson <alex.williamson@redhat.com>2016-09-26 13:52:19 -0600
commitc93a97ee0583cd65adaf872e7cc402493eae92a7 (patch)
treeb36343f50b4951020fc9b7e099f2b7db640eb3e8 /drivers/vfio/pci
parentddf9dc0eb5314d6dac8b19b1cc37c739c6896e7e (diff)
downloadlinux-c93a97ee0583cd65adaf872e7cc402493eae92a7.tar.bz2
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>
Diffstat (limited to 'drivers/vfio/pci')
-rw-r--r--drivers/vfio/pci/vfio_pci_intrs.c7
1 files changed, 7 insertions, 0 deletions
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);