[PATCH 5.19 1012/1157] powerpc/cell/axon_msi: Fix refcount leak in setup_msi_msg_address

From: Greg Kroah-Hartman
Date: Mon Aug 15 2022 - 20:54:28 EST


From: Miaoqian Lin <linmq006@xxxxxxxxx>

[ Upstream commit df5d4b616ee76abc97e5bd348e22659c2b095b1c ]

of_get_next_parent() returns a node pointer with refcount incremented,
we should use of_node_put() on it when not need anymore.
Add missing of_node_put() in the error path to avoid refcount leak.

Fixes: ce21b3c9648a ("[CELL] add support for MSI on Axon-based Cell systems")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220605065129.63906-1-linmq006@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/powerpc/platforms/cell/axon_msi.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/platforms/cell/axon_msi.c b/arch/powerpc/platforms/cell/axon_msi.c
index f3291e957a19..5b012abca773 100644
--- a/arch/powerpc/platforms/cell/axon_msi.c
+++ b/arch/powerpc/platforms/cell/axon_msi.c
@@ -223,6 +223,7 @@ static int setup_msi_msg_address(struct pci_dev *dev, struct msi_msg *msg)
if (!prop) {
dev_dbg(&dev->dev,
"axon_msi: no msi-address-(32|64) properties found\n");
+ of_node_put(dn);
return -ENOENT;
}

--
2.35.1