PCI: xilinx-cpm: Fix reference count leak on error path

stable inclusion
from stable-5.10.20
commit 6a96a4413dcc85b09509f6fe87e74f9dd30cb2ce
bugzilla: 50608

--------------------------------

[ Upstream commit ae191d2e ]

Also drop the reference count of the node on error path.

Link: https://lore.kernel.org/r/20210120143745.699-1-bianpan2016@163.com
Fixes: 508f6106 ("PCI: xilinx-cpm: Add Versal CPM Root Port driver")
Signed-off-by: NPan Bian <bianpan2016@163.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/pci/controller/pcie-xilinx-cpm.c

@@ -404,6 +404,7 @@ static int xilinx_cpm_pcie_init_irq_domain(struct xilinx_cpm_pcie_port *port)
 	return 0;
 out:
 	xilinx_cpm_free_irq_domains(port);
+	of_node_put(pcie_intc_node);
 	dev_err(dev, "Failed to allocate IRQ domains\n");
 
 	return -ENOMEM;