irqchip/gic-v3-mbi: 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/20230213104302.17307-18-johan+linaro@kernel.org

diff --git a/drivers/irqchip/irq-gic-v3-mbi.c b/drivers/irqchip/irq-gic-v3-mbi.c
index e1efdec..dbb8b1e 100644 (file)
--- a/drivers/irqchip/irq-gic-v3-mbi.c
+++ b/drivers/irqchip/irq-gic-v3-mbi.c
@@ -233,13 +233,12 @@ static int mbi_allocate_domains(struct irq_domain *parent)
        struct irq_domain *nexus_domain, *pci_domain, *plat_domain;
        int err;
 
-       nexus_domain = irq_domain_create_tree(parent->fwnode,
-                                             &mbi_domain_ops, NULL);
+       nexus_domain = irq_domain_create_hierarchy(parent, 0, 0, parent->fwnode,
+                                                  &mbi_domain_ops, NULL);
        if (!nexus_domain)
                return -ENOMEM;
 
        irq_domain_update_bus_token(nexus_domain, DOMAIN_BUS_NEXUS);
-       nexus_domain->parent = parent;
 
        err = mbi_allocate_pci_domain(nexus_domain, &pci_domain);