diff options
| -rw-r--r-- | drivers/iommu/of_iommu.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 3afe0b48a48d..082b94c2b329 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -105,6 +105,14 @@ static int of_iommu_configure_device(struct device_node *master_np, of_iommu_configure_dev(master_np, dev); } +static void of_pci_check_device_ats(struct device *dev, struct device_node *np) +{ + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + + if (fwspec && of_property_read_bool(np, "ats-supported")) + fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS; +} + /* * Returns: * 0 on success, an iommu was configured @@ -147,6 +155,7 @@ int of_iommu_configure(struct device *dev, struct device_node *master_np, pci_request_acs(); err = pci_for_each_dma_alias(to_pci_dev(dev), of_pci_iommu_init, &info); + of_pci_check_device_ats(dev, master_np); } else { err = of_iommu_configure_device(master_np, dev, id); } |