[PATCH v2 09/11] ACPI/IORT: Drop ATS fwspec flag

[Jean-Philippe Brucker <jean-philippe@linaro.org>]

Now that the ats_supported flag is in the host bridge structure where it
belongs, we can remove it from the per-device fwspec structure.

Acked-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
 drivers/acpi/arm64/iort.c | 11 -----------
 include/linux/iommu.h     |  4 ----
 2 files changed, 15 deletions(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index d99d7f5b51e1..f634641b3699 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -924,14 +924,6 @@ static int arm_smmu_iort_xlate(struct device *dev, u32 streamid,
 	return ret;
 }
 
-static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node)
-{
-	struct acpi_iort_root_complex *pci_rc;
-
-	pci_rc = (struct acpi_iort_root_complex *)node->node_data;
-	return pci_rc->ats_attribute & ACPI_IORT_ATS_SUPPORTED;
-}
-
 static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node,
 			    u32 streamid)
 {
@@ -1026,9 +1018,6 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 		info.node = node;
 		err = pci_for_each_dma_alias(to_pci_dev(dev),
 					     iort_pci_iommu_init, &info);
-
-		if (!err && iort_pci_rc_supports_ats(node))
-			dev->iommu_fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS;
 	} else {
 		int i = 0;
 
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index d1b5f4d98569..1739f8a7a4b4 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -589,15 +589,11 @@ struct iommu_fwspec {
 	const struct iommu_ops	*ops;
 	struct fwnode_handle	*iommu_fwnode;
 	void			*iommu_priv;
-	u32			flags;
 	u32			num_pasid_bits;
 	unsigned int		num_ids;
 	u32			ids[1];
 };
 
-/* ATS is supported */
-#define IOMMU_FWSPEC_PCI_RC_ATS			(1 << 0)
-
 /**
  * struct iommu_sva - handle to a device-mm bond
  */
-- 
2.25.1