irqchip/gic-v3: Fix refcount leak in gic_populate_ppi_partitions

[ 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>

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 867a45a..fd4fb1b 100644 (file)
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1905,12 +1905,15 @@ 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");