From ca655bc65e830819ded1b7a0b51a3beb204103a2 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Sat, 11 Nov 2017 17:51:25 +0100 Subject: [PATCH] irqchip/gic-v3: Fix ppi-partitions lookup commit 00ee9a1ca5080202bc37b44e998c3b2c74d45817 upstream. Fix child-node lookup during initialisation, which ended up searching the whole device tree depth-first starting at the parent rather than just matching on its children. To make things worse, the parent gic node was prematurely freed, while the ppi-partitions node was leaked. Fixes: e3825ba1af3a ("irqchip/gic-v3: Add support for partitioned PPIs") Signed-off-by: Johan Hovold Signed-off-by: Marc Zyngier Signed-off-by: Greg Kroah-Hartman --- drivers/irqchip/irq-gic-v3.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index b5df99c6f680..3b35271114ee 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1071,18 +1071,18 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node) int nr_parts; struct partition_affinity *parts; - parts_node = of_find_node_by_name(gic_node, "ppi-partitions"); + parts_node = of_get_child_by_name(gic_node, "ppi-partitions"); if (!parts_node) return; nr_parts = of_get_child_count(parts_node); if (!nr_parts) - return; + goto out_put_node; parts = kzalloc(sizeof(*parts) * nr_parts, GFP_KERNEL); if (WARN_ON(!parts)) - return; + goto out_put_node; for_each_child_of_node(parts_node, child_part) { struct partition_affinity *part; @@ -1149,6 +1149,9 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node) gic_data.ppi_descs[i] = desc; } + +out_put_node: + of_node_put(parts_node); } static void __init gic_of_setup_kvm_info(struct device_node *node) -- 2.20.1