iommu/exynos: Use first SYSMMU in controllers list for IOMMU core (66ae88e7) · Commits · 戴 / test

On Exynos platforms there can be more than one SYSMMU (IOMMU) for one DMA master device. Since the IOMMU core code expects only one hardware IOMMU, use the first SYSMMU in the list. Signed-off-by:

Joerg Roedel <jroedel@suse.de> Tested-by:

Marek Szyprowski <m.szyprowski@samsung.com> Acked-by:

Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lore.kernel.org/r/20200429133712.31431-31-joro@8bytes.org Signed-off-by:

Joerg Roedel <jroedel@suse.de>

drivers/iommu/exynos-iommu.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -1261,6 +1261,11 @@ static int exynos_iommu_add_device(struct device *dev)
		}
		iommu_group_put(group);

		/* There is always at least one entry, see exynos_iommu_of_xlate() */
		data = list_first_entry(&owner->controllers,
		struct sysmmu_drvdata, owner_node);
		iommu_device_link(&data->iommu, dev);

		return 0;
		}

		@@ -1286,6 +1291,11 @@ static void exynos_iommu_remove_device(struct device *dev)

		list_for_each_entry(data, &owner->controllers, owner_node)
		device_link_del(data->link);

		/* There is always at least one entry, see exynos_iommu_of_xlate() */
		data = list_first_entry(&owner->controllers,
		struct sysmmu_drvdata, owner_node);
		iommu_device_unlink(&data->iommu, dev);
		}

		static int exynos_iommu_of_xlate(struct device *dev,

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