[irqchip: irq/irqchip-fixes] irqchip/gic-v3: Fix refcount leak in gic_populate_ppi_partitions

[irqchip-bot for Miaoqian Lin]

The following commit has been merged into the irq/irqchip-fixes branch of irqchip:

Commit-ID:     fa1ad9d4cc47ca2470cd904ad4519f05d7e43a2b
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/fa1ad9d4cc47ca2470cd904ad4519f05d7e43a2b
Author:        Miaoqian Lin <linmq006@xxxxxxxxx>
AuthorDate:    Wed, 01 Jun 2022 12:09:29 +04:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Thu, 09 Jun 2022 17:36:57 +01:00

irqchip/gic-v3: Fix refcount leak in gic_populate_ppi_partitions

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: e3825ba1af3a ("irqchip/gic-v3: Add support for partitioned PPIs")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220601080930.31005-6-linmq006@xxxxxxxxx
---
 drivers/irqchip/irq-gic-v3.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 1d5b475..5c1cf90 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1973,12 +1973,15 @@ 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");