[PATCH 5.4 219/240] irqchip/gic-v3: Fix refcount leak in gic_populate_ppi_partitions

Greg Kroah-Hartman
2022-06-20T14:07:17Z

From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit fa1ad9d4cc47ca2470cd904ad4519f05d7e43a2b ]

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@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-6-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 8ce4a2925e92..77a130c03223 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1657,12 +1657,15 @@ 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");
--
2.35.1