linux-kernel - [PATCH 2/9] ACPI/IORT: Use helper functions to access dev->iommu

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Date:   Tue,  4 Dec 2018 17:29:55 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     iommu@...ts.linux-foundation.org
Cc:     Robin Murphy <robin.murphy@....com>, linux-kernel@...r.kernel.org,
        Joerg Roedel <jroedel@...e.de>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Subject: [PATCH 2/9] ACPI/IORT: Use helper functions to access dev->iommu_fwspec

From: Joerg Roedel <jroedel@...e.de>

Use the new helpers dev_iommu_fwspec_get()/set() to access
the dev->iommu_fwspec pointer. This makes it easier to move
that pointer later into another struct.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/acpi/arm64/iort.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 70f4e80b9246..754a67ba49e5 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -779,7 +779,7 @@ static inline bool iort_iommu_driver_enabled(u8 type)
 static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev)
 {
 	struct acpi_iort_node *iommu;
-	struct iommu_fwspec *fwspec = dev->iommu_fwspec;
+	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 
 	iommu = iort_get_iort_node(fwspec->iommu_fwnode);
 
@@ -824,6 +824,7 @@ static inline int iort_add_device_replay(const struct iommu_ops *ops,
  */
 int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
 {
+	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 	struct acpi_iort_its_group *its;
 	struct acpi_iort_node *iommu_node, *its_node = NULL;
 	int i, resv = 0;
@@ -841,9 +842,9 @@ int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
 	 * a given PCI or named component may map IDs to.
 	 */
 
-	for (i = 0; i < dev->iommu_fwspec->num_ids; i++) {
+	for (i = 0; i < fwspec->num_ids; i++) {
 		its_node = iort_node_map_id(iommu_node,
-					dev->iommu_fwspec->ids[i],
+					fwspec->ids[i],
 					NULL, IORT_MSI_TYPE);
 		if (its_node)
 			break;
@@ -1036,6 +1037,7 @@ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
  */
 const struct iommu_ops *iort_iommu_configure(struct device *dev)
 {
+	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 	struct acpi_iort_node *node, *parent;
 	const struct iommu_ops *ops;
 	u32 streamid = 0;
@@ -1045,7 +1047,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 	 * If we already translated the fwspec there
 	 * is nothing left to do, return the iommu_ops.
 	 */
-	ops = iort_fwspec_iommu_ops(dev->iommu_fwspec);
+	ops = iort_fwspec_iommu_ops(fwspec);
 	if (ops)
 		return ops;
 
@@ -1084,7 +1086,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 	 * add_device callback for dev, replay it to get things in order.
 	 */
 	if (!err) {
-		ops = iort_fwspec_iommu_ops(dev->iommu_fwspec);
+		ops = iort_fwspec_iommu_ops(fwspec);
 		err = iort_add_device_replay(ops, dev);
 	}
 
-- 
2.17.1