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gpiolib: Add the support for the msi parent domain

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If the gpio's parent irqdomain is a msi irqdomain, we should ignore
the EEXIST error returned by the msi irqdomain because all the msi
interrupts have already been allocated.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Link: https://lore.kernel.org/r/20200114082821.14015-4-haokexin@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Kevin Hao 2020-01-14 16:28:20 +08:00 committed by Linus Walleij
parent 2425876167
commit 880b7cf22e
1 changed files with 6 additions and 0 deletions
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6
drivers/gpio/gpiolib.c
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@ -2050,6 +2050,12 @@ static int gpiochip_hierarchy_irq_domain_alloc(struct irq_domain *d,
chip_info(gc, "alloc_irqs_parent for %d parent hwirq %d\n",
irq, parent_hwirq);
ret = irq_domain_alloc_irqs_parent(d, irq, 1, parent_arg);
/*
* If the parent irqdomain is msi, the interrupts have already
* been allocated, so the EEXIST is good.
*/
if (irq_domain_is_msi(d->parent) && (ret == -EEXIST))
ret = 0;
if (ret)
chip_err(gc,
"failed to allocate parent hwirq %d for hwirq %lu\n",