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From: Amey Narkhede <ameynarkhede03@gmail.com>
To: Rob Clark <robdclark@gmail.com>
Cc: Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Joerg Roedel <joro@8bytes.org>,
	iommu@lists.linux-foundation.org, linux-arm-msm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Amey Narkhede <ameynarkhede03@gmail.com>
Subject: [PATCH] iommu/qcom: Cleanup resources in case of probe error path
Date: Thu, 22 Apr 2021 03:40:30 +0530	[thread overview]
Message-ID: <20210421221030.70647-1-ameynarkhede03@gmail.com> (raw)

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@gmail.com>
---
 drivers/iommu/arm/arm-smmu/qcom_iommu.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index 4294abe389b2..5fa128a1f7f0 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 +864,14 @@ 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

I assume its ok to leave pm_runtime_enable in case of error.

WARNING: multiple messages have this Message-ID (diff)
From: Amey Narkhede <ameynarkhede03@gmail.com>
To: Rob Clark <robdclark@gmail.com>
Cc: Will Deacon <will@kernel.org>,
	linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	linux-arm-msm@vger.kernel.org,
	Amey Narkhede <ameynarkhede03@gmail.com>,
	Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] iommu/qcom: Cleanup resources in case of probe error path
Date: Thu, 22 Apr 2021 03:40:30 +0530	[thread overview]
Message-ID: <20210421221030.70647-1-ameynarkhede03@gmail.com> (raw)

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@gmail.com>
---
 drivers/iommu/arm/arm-smmu/qcom_iommu.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index 4294abe389b2..5fa128a1f7f0 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 +864,14 @@ 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

I assume its ok to leave pm_runtime_enable in case of error.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID (diff)
From: Amey Narkhede <ameynarkhede03@gmail.com>
To: Rob Clark <robdclark@gmail.com>
Cc: Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Joerg Roedel <joro@8bytes.org>,
	iommu@lists.linux-foundation.org, linux-arm-msm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Amey Narkhede <ameynarkhede03@gmail.com>
Subject: [PATCH] iommu/qcom: Cleanup resources in case of probe error path
Date: Thu, 22 Apr 2021 03:40:30 +0530	[thread overview]
Message-ID: <20210421221030.70647-1-ameynarkhede03@gmail.com> (raw)

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@gmail.com>
---
 drivers/iommu/arm/arm-smmu/qcom_iommu.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index 4294abe389b2..5fa128a1f7f0 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 +864,14 @@ 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

I assume its ok to leave pm_runtime_enable in case of error.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2021-04-21 22:10 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21 22:10 Amey Narkhede [this message]
2021-04-21 22:10 ` [PATCH] iommu/qcom: Cleanup resources in case of probe error path Amey Narkhede
2021-04-21 22:10 ` Amey Narkhede
2021-06-08  9:29 ` Will Deacon
2021-06-08  9:29   ` Will Deacon
2021-06-08  9:29   ` Will Deacon
2021-06-08 14:55   ` Amey Narkhede
2021-06-08 14:55     ` Amey Narkhede
2021-06-08 14:55     ` Amey Narkhede

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