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powerpc/iommu: Add missing of_node_put in iommu_init_early_dart

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[ Upstream commit 57b742a5b8 ]

The device_node pointer is returned by of_find_compatible_node
with refcount incremented. We should use of_node_put() to avoid
the refcount leak.

Signed-off-by: Peng Wu <wupeng58@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220425081245.21705-1-wupeng58@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Peng Wu 2022-04-25 08:12:45 +00:00 • committed by Justin Hammond
parent 7cb1a4f597
commit 82ee6bf993
1 changed files with 4 additions and 2 deletions
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6
arch/powerpc/sysdev/dart_iommu.c
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@ -404,9 +404,10 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops)
}
/* Initialize the DART HW */
if (dart_init(dn) != 0)
if (dart_init(dn) != 0) {
of_node_put(dn);
return;
}
/*
* U4 supports a DART bypass, we use it for 64-bit capable devices to
* improve performance. However, that only works for devices connected
@ -419,6 +420,7 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops)
/* Setup pci_dma ops */
set_pci_dma_ops(&dma_iommu_ops);
of_node_put(dn);
}
#ifdef CONFIG_PM