From: Robin Murphy <robin.murphy@arm.com>
To: joro@8bytes.org
Cc: will@kernel.org, iommu@lists.linux.dev,
linux-arm-kernel@lists.infradead.org, baolu.lu@linux.intel.com,
kevin.tian@intel.com, suravee.suthikulpanit@amd.com,
vasant.hegde@amd.com, mjrosato@linux.ibm.com,
schnelle@linux.ibm.com, linux-kernel@vger.kernel.org
Subject: [PATCH v4 14/16] iommu/tegra-smmu: Clean up bus_set_iommu()
Date: Mon, 15 Aug 2022 17:20:15 +0100 [thread overview]
Message-ID: <13bb6baa6c4d74e95a12529e4eb1ddfb3885c3b5.1660572783.git.robin.murphy@arm.com> (raw)
In-Reply-To: <cover.1660572783.git.robin.murphy@arm.com>
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>
---
v4: No change
drivers/iommu/tegra-smmu.c | 29 ++++++-----------------------
1 file changed, 6 insertions(+), 23 deletions(-)
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 2a8de975fe63..5b1af40221ec 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -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)
--
2.36.1.dirty
next prev parent reply other threads:[~2022-08-15 16:20 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-15 16:20 [PATCH v4 00/16] iommu: retire bus_set_iommu() Robin Murphy
2022-08-15 16:20 ` [PATCH v4 01/16] iommu/vt-d: Handle race between registration and device probe Robin Murphy
2022-08-15 16:20 ` [PATCH v4 02/16] iommu/amd: " Robin Murphy
2022-08-15 16:20 ` [PATCH v4 03/16] iommu/s390: Fail probe for non-PCI devices Robin Murphy
2022-08-15 16:20 ` [PATCH v4 04/16] iommu: Always register bus notifiers Robin Murphy
2022-08-18 7:34 ` Tian, Kevin
2022-09-07 18:50 ` Saravana Kannan
2022-09-07 20:27 ` Robin Murphy
2022-08-15 16:20 ` [PATCH v4 05/16] iommu: Move bus setup to IOMMU device registration Robin Murphy
2022-10-06 14:01 ` Jon Hunter
2022-10-06 15:27 ` Robin Murphy
2022-10-06 17:12 ` Thierry Reding
2022-10-06 18:43 ` Dmitry Osipenko
2022-10-18 6:13 ` Jon Hunter
2022-10-18 21:12 ` Dmitry Osipenko
2022-10-12 16:28 ` Alex Williamson
2022-10-13 1:08 ` Baolu Lu
2022-08-15 16:20 ` [PATCH v4 06/16] iommu/amd: Clean up bus_set_iommu() Robin Murphy
2022-08-15 16:20 ` [PATCH v4 07/16] iommu/arm-smmu: " Robin Murphy
2022-08-15 16:20 ` [PATCH v4 08/16] iommu/arm-smmu-v3: " Robin Murphy
2022-08-15 16:20 ` [PATCH v4 09/16] iommu/dart: " Robin Murphy
2022-08-15 16:20 ` [PATCH v4 10/16] iommu/exynos: " Robin Murphy
2022-08-15 16:20 ` [PATCH v4 11/16] iommu/ipmmu-vmsa: " Robin Murphy
2022-08-16 0:25 ` kernel test robot
2022-08-15 16:20 ` [PATCH v4 12/16] iommu/mtk: " Robin Murphy
2022-08-15 16:20 ` [PATCH v4 13/16] iommu/omap: " Robin Murphy
2022-08-15 16:20 ` Robin Murphy [this message]
2022-08-15 16:20 ` [PATCH v4 15/16] iommu/virtio: " Robin Murphy
2022-08-15 16:20 ` [PATCH v4 16/16] iommu: " Robin Murphy
2022-09-07 12:27 ` [PATCH v4 00/16] iommu: retire bus_set_iommu() Joerg Roedel
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