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irqdomain: Handle domain hierarchy parent in irq_domain_instantiate()

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To use irq_domain_instantiate() from irq_domain_create_hierarchy(),
irq_domain_instantiate() needs to handle the domain hierarchy parent.

Add the required functionality.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240614173232.1184015-9-herve.codina@bootlin.com
This commit is contained in:
Herve Codina 2024-06-14 19:32:09 +02:00 committed by Thomas Gleixner
parent 757398541c
commit 419e3778ff
2 changed files with 13 additions and 0 deletions
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6
include/linux/irqdomain.h
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@ -276,6 +276,12 @@ struct irq_domain_info {
int direct_max;
const struct irq_domain_ops *ops;
void *host_data;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
/**
* @parent: Pointer to the parent irq domain used in a hierarchy domain
*/
struct irq_domain *parent;
#endif
};
struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info);

7
kernel/irq/irqdomain.c
View File

@ -265,6 +265,13 @@ struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info)
domain->flags |= info->domain_flags;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
if (info->parent) {
domain->root = info->parent->root;
domain->parent = info->parent;
}
#endif
__irq_domain_publish(domain);
return domain;