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Message-Id: <20210608164559.204023-1-ameynarkhede03@gmail.com>
Date: Tue, 8 Jun 2021 22:15:59 +0530
From: Amey Narkhede <ameynarkhede03@...il.com>
To: Rob Clark <robdclark@...il.com>
Cc: Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
Joerg Roedel <joro@...tes.org>,
iommu@...ts.linux-foundation.org, linux-arm-msm@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Jon Hunter <jonathanh@...dia.com>,
Krishna Reddy <vdumpa@...dia.com>,
Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
Jean-Philippe Brucker <jean-philippe@...aro.org>,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Barry Song <song.bao.hua@...ilicon.com>,
Zenghui Yu <yuzenghui@...wei.com>,
Amey Narkhede <ameynarkhede03@...il.com>
Subject: [PATCH] iommu/arm: Cleanup resources in case of probe error path
If device registration fails, remove sysfs attribute
and if setting bus callbacks fails, unregister the device
and cleanup the sysfs attribute.
Signed-off-by: Amey Narkhede <ameynarkhede03@...il.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 14 ++++++++++++--
drivers/iommu/arm/arm-smmu/arm-smmu.c | 15 ++++++++++++---
drivers/iommu/arm/arm-smmu/qcom_iommu.c | 13 +++++++++++--
3 files changed, 35 insertions(+), 7 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 54b2f27b81d4..de2499754025 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3669,10 +3669,20 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
ret = iommu_device_register(&smmu->iommu, &arm_smmu_ops, dev);
if (ret) {
dev_err(dev, "Failed to register iommu\n");
- return ret;
+ goto err_sysfs_remove;
}
- return arm_smmu_set_bus_ops(&arm_smmu_ops);
+ ret = arm_smmu_set_bus_ops(&arm_smmu_ops);
+ if (ret)
+ goto err_unregister_device;
+
+ return 0;
+
+err_unregister_device:
+ iommu_device_unregister(&smmu->iommu);
+err_sysfs_remove:
+ iommu_device_sysfs_remove(&smmu->iommu);
+ return ret;
}
static int arm_smmu_device_remove(struct platform_device *pdev)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 6f72c4d208ca..88a3023676ce 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -2164,7 +2164,7 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
err = iommu_device_register(&smmu->iommu, &arm_smmu_ops, dev);
if (err) {
dev_err(dev, "Failed to register iommu\n");
- return err;
+ goto err_sysfs_remove;
}
platform_set_drvdata(pdev, smmu);
@@ -2187,10 +2187,19 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
* any device which might need it, so we want the bus ops in place
* ready to handle default domain setup as soon as any SMMU exists.
*/
- if (!using_legacy_binding)
- return arm_smmu_bus_init(&arm_smmu_ops);
+ if (!using_legacy_binding) {
+ err = arm_smmu_bus_init(&arm_smmu_ops);
+ if (err)
+ goto err_unregister_device;
+ }
return 0;
+
+err_unregister_device:
+ iommu_device_unregister(&smmu->iommu);
+err_sysfs_remove:
+ iommu_device_sysfs_remove(&smmu->iommu);
+ return err;
}
static int arm_smmu_device_remove(struct platform_device *pdev)
diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index 4294abe389b2..b785d9fb7602 100644
--- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c
+++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
@@ -850,10 +850,12 @@ static int qcom_iommu_device_probe(struct platform_device *pdev)
ret = iommu_device_register(&qcom_iommu->iommu, &qcom_iommu_ops, dev);
if (ret) {
dev_err(dev, "Failed to register iommu\n");
- return ret;
+ goto err_sysfs_remove;
}
- bus_set_iommu(&platform_bus_type, &qcom_iommu_ops);
+ ret = bus_set_iommu(&platform_bus_type, &qcom_iommu_ops);
+ if (ret)
+ goto err_unregister_device;
if (qcom_iommu->local_base) {
pm_runtime_get_sync(dev);
@@ -862,6 +864,13 @@ static int qcom_iommu_device_probe(struct platform_device *pdev)
}
return 0;
+
+err_unregister_device:
+ iommu_device_unregister(&qcom_iommu->iommu);
+
+err_sysfs_remove:
+ iommu_device_sysfs_remove(&qcom_iommu->iommu);
+ return ret;
}
static int qcom_iommu_device_remove(struct platform_device *pdev)
--
2.31.1
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