PCI: rockchip: Fix a leaked reference by adding missing of_node_put()

The call to of_get_child_by_name() returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

irq_domain_add_linear() also calls of_node_get() to increase refcount,
so irq_domain will not be affected when it is released.

Detected by coccinelle with the following warnings:
  ./drivers/pci/controller/pcie-rockchip-host.c:729:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 718, but without a corresponding object release within this function.
  ./drivers/pci/controller/pcie-rockchip-host.c:732:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 718, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Cc: Shawn Lin <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Heiko Stuebner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c
index 1372d270764f..8d20f1793a61 100644
--- a/drivers/pci/controller/pcie-rockchip-host.c
+++ b/drivers/pci/controller/pcie-rockchip-host.c
@@ -724,6 +724,7 @@ static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
 
 	rockchip->irq_domain = irq_domain_add_linear(intc, PCI_NUM_INTX,
 						    &intx_domain_ops, rockchip);
+	of_node_put(intc);
 	if (!rockchip->irq_domain) {
 		dev_err(dev, "failed to get a INTx IRQ domain\n");
 		return -EINVAL;