irqchip/gic-v3: Fix refcount leak in gic_populate_ppi_partitions

stable inclusion
from stable-4.19.249
commit e824482e2c5edacc961b7dd30a92fd47606c3036
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5I4FP
CVE: NA

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

[ Upstream commit fa1ad9d4 ]

of_find_node_by_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: e3825ba1 ("irqchip/gic-v3: Add support for partitioned PPIs")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Signed-off-by: NMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-6-linmq006@gmail.comSigned-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NYongqiang Liu <liuyongqiang13@huawei.com>

drivers/irqchip/irq-gic-v3.c

@@ -1686,12 +1686,15 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
 				continue;
 
 			cpu = of_cpu_node_to_id(cpu_node);
-			if (WARN_ON(cpu < 0))
+			if (WARN_ON(cpu < 0)) {
+				of_node_put(cpu_node);
 				continue;
+			}
 
 			pr_cont("%pOF[%d] ", cpu_node, cpu);
 
 			cpumask_set_cpu(cpu, &part->mask);
+			of_node_put(cpu_node);
 		}
 
 		pr_cont("}\n");