iommu/vt-d: Fix IOMMU lookup for SR-IOV Virtual Functions

[linux-2.6-microblaze.git] / drivers / iommu / dmar.c

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 58470f5..8c53748 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -338,7 +338,9 @@ static int dmar_pci_bus_notifier(struct notifier_block *nb,
        struct pci_dev *pdev = to_pci_dev(data);
        struct dmar_pci_notify_info *info;
 
-       /* Only care about add/remove events for physical functions */
+       /* Only care about add/remove events for physical functions.
+        * For VFs we actually do the lookup based on the corresponding
+        * PF in device_to_iommu() anyway. */
        if (pdev->is_virtfn)
                return NOTIFY_DONE;
        if (action != BUS_NOTIFY_ADD_DEVICE &&