[PATCH AUTOSEL 5.4 18/20] powerpc/iommu: Add missing of_node_put in iommu_init_early_dart
From: Sasha Levin
Date: Wed Jun 01 2022 - 10:12:14 EST
From: Peng Wu <wupeng58@xxxxxxxxxx>
[ Upstream commit 57b742a5b8945118022973e6416b71351df512fb ]
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@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220425081245.21705-1-wupeng58@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/powerpc/sysdev/dart_iommu.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index 6b4a34b36d98..8ff9bcfe4b8d 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -403,9 +403,10 @@ 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
@@ -418,6 +419,7 @@ 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
--
2.35.1