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| author |   Marc Zyngier <maz@kernel.org> | 2020-08-26 18:37:50 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-06 18:25:23 +0100 |
| commit | cd1752d34ef33d68d82ef9dcc699b4eaa17c07fc (patch) | |
| tree | 460059bbb7d26d87ada5c2c8b058f23e196034e2 /kernel/irq/resend.c | |
| parent | Linux 5.9-rc1 (diff) | |
| download | linux-dev-cd1752d34ef33d68d82ef9dcc699b4eaa17c07fc.tar.xz linux-dev-cd1752d34ef33d68d82ef9dcc699b4eaa17c07fc.zip | |
genirq: Walk the irq_data hierarchy when resending an interrupt
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>
Diffstat (limited to 'kernel/irq/resend.c')
| -rw-r--r-- | kernel/irq/resend.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index c48ce19a257f..8ccd32a0cc80 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -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 */ |