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genirq: Walk the irq_data hierarchy when resending an interrupt

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On resending an interrupt, we only check the outermost irqchip for
a irq_retrigger callback. However, this callback could be implemented
at an inner level. Use irq_chip_retrigger_hierarchy() in this case.

Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2020-08-26 18:37:50 +01:00
parent 9123e3a74e
commit cd1752d34e
1 changed files with 13 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

15
kernel/irq/resend.c
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@ -86,6 +86,18 @@ static int irq_sw_resend(struct irq_desc *desc)
}
#endif
static int try_retrigger(struct irq_desc *desc)
{
if (desc->irq_data.chip->irq_retrigger)
return desc->irq_data.chip->irq_retrigger(&desc->irq_data);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
return irq_chip_retrigger_hierarchy(&desc->irq_data);
#else
return 0;
#endif
}
/*
* IRQ resend
*
@ -113,8 +125,7 @@ int check_irq_resend(struct irq_desc *desc, bool inject)
desc->istate &= ~IRQS_PENDING;
if (!desc->irq_data.chip->irq_retrigger ||
!desc->irq_data.chip->irq_retrigger(&desc->irq_data))
if (!try_retrigger(desc))
err = irq_sw_resend(desc);
/* If the retrigger was successfull, mark it with the REPLAY bit */