[PATCH v4 16/19] iommu/gart: Add set_platform_dma_ops callback

[Lu Baolu]

This IOMMU driver doesn't support default domain. Add the implementation
of set_platform_dma_ops callback so that the IOMMU core could return the
DMA control. With set_platform_dma_ops implemented, there's no need for
detach_dev. Remove it to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
---
 drivers/iommu/tegra-gart.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index ed53279d1106..a482ff838b53 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -124,9 +124,9 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain,
 	return ret;
 }
 
-static void gart_iommu_detach_dev(struct iommu_domain *domain,
-				  struct device *dev)
+static void gart_iommu_set_platform_dma(struct device *dev)
 {
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
 	struct gart_device *gart = gart_handle;
 
 	spin_lock(&gart->dom_lock);
@@ -270,11 +270,11 @@ static const struct iommu_ops gart_iommu_ops = {
 	.domain_alloc	= gart_iommu_domain_alloc,
 	.probe_device	= gart_iommu_probe_device,
 	.device_group	= generic_device_group,
+	.set_platform_dma_ops = gart_iommu_set_platform_dma,
 	.pgsize_bitmap	= GART_IOMMU_PGSIZES,
 	.of_xlate	= gart_iommu_of_xlate,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= gart_iommu_attach_dev,
-		.detach_dev	= gart_iommu_detach_dev,
 		.map		= gart_iommu_map,
 		.unmap		= gart_iommu_unmap,
 		.iova_to_phys	= gart_iommu_iova_to_phys,
-- 
2.34.1