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iommu/tegra-smmu: Clean up bus_set_iommu() 

Stop calling bus_set_iommu() since it's now unnecessary, and simplify
the probe failure path accordingly.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/13bb6baa6c4d74e95a12529e4eb1ddfb3885c3b5.1660572783.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy 2022-08-15 17:20:15 +01:00 committed by Joerg Roedel
parent a24090860e
commit 48a7c5080a
1 changed files with 6 additions and 23 deletions
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29
drivers/iommu/tegra-smmu.c
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@ -1083,8 +1083,8 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
/*
* This is a bit of a hack. Ideally we'd want to simply return this
* value. However the IOMMU registration process will attempt to add
* all devices to the IOMMU when bus_set_iommu() is called. In order
* value. However iommu_device_register() will attempt to add
* all devices to the IOMMU before we get that far. In order
* not to rely on global variables to track the IOMMU instance, we
* set it here so that it can be looked up from the .probe_device()
* callback via the IOMMU device's .drvdata field.
@ -1138,32 +1138,15 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
return ERR_PTR(err);
err = iommu_device_register(&smmu->iommu, &tegra_smmu_ops, dev);
if (err)
goto remove_sysfs;
err = bus_set_iommu(&platform_bus_type, &tegra_smmu_ops);
if (err < 0)
goto unregister;
#ifdef CONFIG_PCI
err = bus_set_iommu(&pci_bus_type, &tegra_smmu_ops);
if (err < 0)
goto unset_platform_bus;
#endif
if (err) {
iommu_device_sysfs_remove(&smmu->iommu);
return ERR_PTR(err);
}
if (IS_ENABLED(CONFIG_DEBUG_FS))
tegra_smmu_debugfs_init(smmu);
return smmu;
unset_platform_bus: __maybe_unused;
bus_set_iommu(&platform_bus_type, NULL);
unregister:
iommu_device_unregister(&smmu->iommu);
remove_sysfs:
iommu_device_sysfs_remove(&smmu->iommu);
return ERR_PTR(err);
}
void tegra_smmu_remove(struct tegra_smmu *smmu)