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irqchip/gic-v3-its: Use irq_domain_create_hierarchy()

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

Note that the domain host_data was first set to the struct its_node
during allocation only to immediately be overwritten with the struct
msi_domain_info.

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/20230213104302.17307-17-johan+linaro@kernel.org
This commit is contained in:
Johan Hovold 2023-02-13 11:42:58 +01:00 committed by Marc Zyngier
parent e6e8cd62a5
commit 1e46e040de
1 changed files with 7 additions and 6 deletions
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13
drivers/irqchip/irq-gic-v3-its.c
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@ -4909,18 +4909,19 @@ static int its_init_domain(struct fwnode_handle *handle, struct its_node *its)
if (!info)
return -ENOMEM;
inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its);
info->ops = &its_msi_domain_ops;
info->data = its;
inner_domain = irq_domain_create_hierarchy(its_parent,
its->msi_domain_flags, 0,
handle, &its_domain_ops,
info);
if (!inner_domain) {
kfree(info);
return -ENOMEM;
}
inner_domain->parent = its_parent;
irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS);
inner_domain->flags |= its->msi_domain_flags;
info->ops = &its_msi_domain_ops;
info->data = its;
inner_domain->host_data = info;
return 0;
}