Commit 948f7d7b authored by Wei Yang's avatar Wei Yang Committed by Luis Henriques

vfio-pci: Fix the check on pci device type in vfio_pci_probe()

commit 7c2e211f upstream.

Current vfio-pci just supports normal pci device, so vfio_pci_probe() will
return if the pci device is not a normal device. While current code makes a
mistake. PCI_HEADER_TYPE is the offset in configuration space of the device
type, but we use this value to mask the type value.

This patch fixs this by do the check directly on the pci_dev->hdr_type.
Signed-off-by: default avatarWei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent 6b5a8a5d
......@@ -810,13 +810,11 @@ static const struct vfio_device_ops vfio_pci_ops = {
static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
u8 type;
struct vfio_pci_device *vdev;
struct iommu_group *group;
int ret;
pci_read_config_byte(pdev, PCI_HEADER_TYPE, &type);
if ((type & PCI_HEADER_TYPE) != PCI_HEADER_TYPE_NORMAL)
if (pdev->hdr_type != PCI_HEADER_TYPE_NORMAL)
return -EINVAL;
group = iommu_group_get(&pdev->dev);
......
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