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From: Miaoqian Lin <linmq006@gmail.com>
Cc: linmq006@gmail.com, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	linux-tegra@vger.kernel.org, Will Deacon <will@kernel.org>
Subject: [PATCH] iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find
Date: Fri,  7 Jan 2022 08:09:11 +0000	[thread overview]
Message-ID: <20220107080915.12686-1-linmq006@gmail.com> (raw)

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.
Add the corresponding 'put_device()' in the error handling path.

Fixes: 765a9d1d02b2 ("iommu/tegra-smmu: Fix mc errors on tegra124-nyan")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/iommu/tegra-smmu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index e900e3c46903..2561ce8a2ce8 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -808,8 +808,10 @@ static struct tegra_smmu *tegra_smmu_find(struct device_node *np)
 		return NULL;
 
 	mc = platform_get_drvdata(pdev);
-	if (!mc)
+	if (!mc) {
+		put_device(&pdev->dev);
 		return NULL;
+	}
 
 	return mc->smmu;
 }
-- 
2.17.1

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID (diff)
From: Miaoqian Lin <linmq006@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: linmq006@gmail.com, Thierry Reding <thierry.reding@gmail.com>,
	Krishna Reddy <vdumpa@nvidia.com>, Joerg Roedel <joro@8bytes.org>,
	Will Deacon <will@kernel.org>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Nicolin Chen <nicoleotsuka@gmail.com>,
	linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find
Date: Fri,  7 Jan 2022 08:09:11 +0000	[thread overview]
Message-ID: <20220107080915.12686-1-linmq006@gmail.com> (raw)

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.
Add the corresponding 'put_device()' in the error handling path.

Fixes: 765a9d1d02b2 ("iommu/tegra-smmu: Fix mc errors on tegra124-nyan")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/iommu/tegra-smmu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index e900e3c46903..2561ce8a2ce8 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -808,8 +808,10 @@ static struct tegra_smmu *tegra_smmu_find(struct device_node *np)
 		return NULL;
 
 	mc = platform_get_drvdata(pdev);
-	if (!mc)
+	if (!mc) {
+		put_device(&pdev->dev);
 		return NULL;
+	}
 
 	return mc->smmu;
 }
-- 
2.17.1


             reply	other threads:[~2022-01-07  8:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-07  8:09 Miaoqian Lin [this message]
2022-01-07  8:09 ` [PATCH] iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find Miaoqian Lin
2022-01-31 15:25 ` Joerg Roedel
2022-01-31 15:25   ` Joerg Roedel
2022-02-16 13:48 ` Thierry Reding
2022-02-16 13:48   ` Thierry Reding
2022-02-28 12:16 ` Joerg Roedel
2022-02-28 12:16   ` Joerg Roedel

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