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irqdomain: Use hwirq_max instead of revmap_size for NOMAP domains

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NOMAP irq domains use the revmap_size field to indicate the maximum
hwirq number the domain accepts. This is a bit confusing as
revmap_size is usually used to indicate the size of the revmap array,
which a NOMAP domain doesn't have.

Instead, use the hwirq_max field which has the correct semantics, and
keep revmap_size to 0 for a NOMAP domain.

Signed-off-by: Xu Qiang <xuqiang36@huawei.com>
[maz: commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220719063641.56541-3-xuqiang36@huawei.com
This commit is contained in:
Xu Qiang 2022-07-19 06:36:41 +00:00 committed by Marc Zyngier
parent 6f194c99f4
commit ef50cd57a7
1 changed files with 6 additions and 6 deletions
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12
kernel/irq/irqdomain.c
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@ -147,7 +147,8 @@ struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, unsigned int s
static atomic_t unknown_domains;
if (WARN_ON((size && direct_max) ||
(!IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) && direct_max)))
(!IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) && direct_max) ||
(direct_max && (direct_max != hwirq_max))))
return NULL;
domain = kzalloc_node(struct_size(domain, revmap, size),
@ -219,7 +220,6 @@ struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, unsigned int s
domain->hwirq_max = hwirq_max;
if (direct_max) {
size = direct_max;
domain->flags |= IRQ_DOMAIN_FLAG_NO_MAP;
}
@ -650,9 +650,9 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain)
pr_debug("create_direct virq allocation failed\n");
return 0;
}
if (virq >= domain->revmap_size) {
pr_err("ERROR: no free irqs available below %i maximum\n",
domain->revmap_size);
if (virq >= domain->hwirq_max) {
pr_err("ERROR: no free irqs available below %lu maximum\n",
domain->hwirq_max);
irq_free_desc(virq);
return 0;
}
@ -906,7 +906,7 @@ struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
return desc;
if (irq_domain_is_nomap(domain)) {
if (hwirq < domain->revmap_size) {
if (hwirq < domain->hwirq_max) {
data = irq_domain_get_irq_data(domain, hwirq);
if (data && data->hwirq == hwirq)
desc = irq_data_to_desc(data);