irqchip/gic-v2m: Use irq_domain_create_hierarchy()

Use the irq_domain_create_hierarchy() helper to create the hierarchical
domain, which both serves as documentation and avoids poking at
irqdomain internals.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230213104302.17307-16-johan+linaro@kernel.org

diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
index f4d7eeb..f1e75b3 100644 (file)
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -287,15 +287,14 @@ static __init int gicv2m_allocate_domains(struct irq_domain *parent)
        if (!v2m)
                return 0;
 
-       inner_domain = irq_domain_create_tree(v2m->fwnode,
-                                             &gicv2m_domain_ops, v2m);
+       inner_domain = irq_domain_create_hierarchy(parent, 0, 0, v2m->fwnode,
+                                                  &gicv2m_domain_ops, v2m);
        if (!inner_domain) {
                pr_err("Failed to create GICv2m domain\n");
                return -ENOMEM;
        }
 
        irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS);
-       inner_domain->parent = parent;
        pci_domain = pci_msi_create_irq_domain(v2m->fwnode,
                                               &gicv2m_msi_domain_info,
                                               inner_domain);