powerpc/pci_dn: Add missing of_node_put()

[ Upstream commit fdb6bdb874aa90d80fe4bd4c2a9184992f22a222 ]

In pci_add_device_node_info(), use of_node_put() to drop the reference
to 'parent' returned by of_get_parent() to keep refcount balance.

Fixes: d60b7ad61872 ("powerpc/pci: Refactor pci_dn")
Co-authored-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Link: https://lore.kernel.org/r/20220701131750.240170-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index d876eda926094d500da8518a3deaa819dc9e1217..d28433f0fc8e7a4859f09bf7329fe18eafe25792 100644 (file)
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -325,6 +325,7 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
        INIT_LIST_HEAD(&pdn->list);
        parent = of_get_parent(dn);
        pdn->parent = parent ? PCI_DN(parent) : NULL;
+       of_node_put(parent);
        if (pdn->parent)
                list_add_tail(&pdn->list, &pdn->parent->child_list);