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authorWei Yang <weiyang@linux.vnet.ibm.com>2015-01-07 10:29:11 -0700
committerAlex Williamson <alex.williamson@redhat.com>2015-01-07 10:29:11 -0700
commit7c2e211f3c95b91912a92a8c6736343690042e2e (patch)
tree2cbc83b9b08e1504fe283330915afdecc5e337db /drivers/vfio
parentb1940cd21c0f4abdce101253e860feff547291b0 (diff)
downloadlinux-7c2e211f3c95b91912a92a8c6736343690042e2e.tar.bz2
vfio-pci: Fix the check on pci device type in vfio_pci_probe()
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: Wei Yang <weiyang@linux.vnet.ibm.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Cc: stable@vger.kernel.org # v3.6+
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/pci/vfio_pci.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 255201f22126..7cc0122a18ce 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -840,13 +840,11 @@ 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);