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iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find

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commit 9826e393e4 upstream.

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: 765a9d1d02 ("iommu/tegra-smmu: Fix mc errors on tegra124-nyan")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20220107080915.12686-1-linmq006@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Miaoqian Lin 2022-01-07 08:09:11 +00:00 committed by Greg Kroah-Hartman
parent 2b04bb51a9
commit 6be5b626be
1 changed files with 3 additions and 1 deletions
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4
drivers/iommu/tegra-smmu.c
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@ -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;
}