diff options
| author | Johan Hovold <johan@kernel.org> | 2017-11-11 17:51:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:39:06 +0000 |
| commit | 828064b87804bf078e92366335335219c678706a (patch) | |
| tree | acf2cda895a1700e618a70d39af7a026054ccdaa /drivers/irqchip | |
| parent | e5386fca7e04b281e59a719a76243d83e3c2d63a (diff) | |
| download | linux-rt-828064b87804bf078e92366335335219c678706a.tar.gz | |
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 <johan@kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 24d388d74011..a37576a1798d 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1022,18 +1022,18 @@ 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; @@ -1100,6 +1100,9 @@ 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) |