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irqdomain: Report irq number for NOMAP domains

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When using a NOMAP domain, __irq_resolve_mapping() doesn't store
the Linux IRQ number at the address optionally provided by the caller.
While this isn't a huge deal (the returned value is guaranteed
to the hwirq that was passed as a parameter), let's honour the letter
of the API by writing the expected value.

Fixes: d22558dd0a (“irqdomain: Introduce irq_resolve_mapping()”)
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/20220719063641.56541-2-xuqiang36@huawei.com
This commit is contained in:
Xu Qiang 2022-07-19 06:36:40 +00:00 committed by Marc Zyngier
parent 295171705c
commit 6f194c99f4
1 changed files with 2 additions and 0 deletions
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kernel/irq/irqdomain.c
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@ -910,6 +910,8 @@ struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
data = irq_domain_get_irq_data(domain, hwirq);
if (data && data->hwirq == hwirq)
desc = irq_data_to_desc(data);
if (irq && desc)
*irq = hwirq;
}
return desc;