linux-kernel - [PATCH 6.0 610/862] powerpc/pci_dn: Add missing of_node

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Date:   Wed, 19 Oct 2022 10:31:37 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Liang He <windhl@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Tyrel Datwyler <tyreld@...ux.ibm.com>,
        Sasha Levin <sashal@...nel.org>,
        Miaoqian Lin <linmq006@...il.com>
Subject: [PATCH 6.0 610/862] powerpc/pci_dn: Add missing of_node_put()

From: Liang He <windhl@....com>

[ Upstream commit 110a1fcb6c4d55144d8179983a475f17a1d6f832 ]

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: cca87d303c85 ("powerpc/pci: Refactor pci_dn")
Co-authored-by: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: Liang He <windhl@....com>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Reviewed-by: Tyrel Datwyler <tyreld@...ux.ibm.com>
Link: https://lore.kernel.org/r/20220701131750.240170-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/powerpc/kernel/pci_dn.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 7a35fc25a304..38561d6a2079 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -330,6 +330,7 @@ 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);
 
-- 
2.35.1