Patch "irqchip/gic-v3: Fix ppi-partitions lookup" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

irqchip/gic-v3: Fix ppi-partitions lookup

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
irqchip-gic-v3-fix-ppi-partitions-lookup.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Johan Hovold <[email protected]>
Date: Sat, 11 Nov 2017 17:51:25 +0100
Subject: irqchip/gic-v3: Fix ppi-partitions lookup

From: Johan Hovold <[email protected]>

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.

---
 drivers/irqchip/irq-gic-v3.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

@@ -1022,18 +1022,18 @@ static void __init gic_populate_ppi_part
 	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_part
 
 		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)

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/irqchip-gic-v3-fix-ppi-partitions-lookup.patch