[PATCH v2 1/2] [Security Check] vfio/pci: Refine Intel IGD OpRegion support

[Gao, Fred]

It is true for OpRegion address zero on dGPU.

Change-Id: If1bf77b50ada044114ee00e6151858118f2d3ee8
Signed-off-by: Gao, Fred <fred.gao at intel.com>
---
 drivers/vfio/pci/vfio_pci_igd.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci_igd.c b/drivers/vfio/pci/vfio_pci_igd.c
index 53d97f459252..eff0d3d99832 100644
--- a/drivers/vfio/pci/vfio_pci_igd.c
+++ b/drivers/vfio/pci/vfio_pci_igd.c
@@ -63,7 +63,11 @@ static int vfio_pci_igd_opregion_init(struct vfio_pci_device *vdev)
 	if (ret)
 		return ret;
 
-	if (!addr || !(~addr))
+	/* addr =0 for dGPU with expansion ROM */
+	if (!addr)
+		return 0;
+
+	if (!(~addr))
 		return -ENODEV;
 
 	base = memremap(addr, OPREGION_SIZE, MEMREMAP_WB);
-- 
2.17.1