PCI: mediatek-gen3: Fix refcount leak in mtk_pcie_init_irq_domains()

[ Upstream commit bf038503d5fe90189743124233fe7aeb0984e961 ]

of_get_child_by_name() returns a node pointer with refcount incremented, so
we should use of_node_put() on it when we don't need it anymore.

Add missing of_node_put() to avoid refcount leak.

Fixes: 814cceebba9b ("PCI: mediatek-gen3: Add INTx support")
Link: https://lore.kernel.org/r/20220601041259.56185-1-linmq006@gmail.com
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Miles Chen <miles.chen@mediatek.com>
Acked-by: Jianjun Wang <jianjun.wang@mediatek.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index 21207df..36c8702 100644 (file)
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -600,7 +600,8 @@ static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port)
                                                  &intx_domain_ops, port);
        if (!port->intx_domain) {
                dev_err(dev, "failed to create INTx IRQ domain\n");
-               return -ENODEV;
+               ret = -ENODEV;
+               goto out_put_node;
        }
 
        /* Setup MSI */
@@ -623,6 +624,7 @@ static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port)
                goto err_msi_domain;
        }
 
+       of_node_put(intc_node);
        return 0;
 
 err_msi_domain:
@@ -630,6 +632,8 @@ err_msi_domain:
 err_msi_bottom_domain:
        irq_domain_remove(port->intx_domain);
 
+out_put_node:
+       of_node_put(intc_node);
        return ret;
 }