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PCI: apple: Change MSI handling to handle 4-cell AIC fwspec form

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AIC2 changes the IRQ fwspec to add a cell. Always use the second-to-last
cell for the MSI handling, so it will work for both AIC1 and AIC2 devices.

Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220309192123.152028-2-marcan@marcan.st
This commit is contained in:
Hector Martin 2022-03-10 04:21:17 +09:00 committed by Marc Zyngier
parent dfd42facf1
commit 89eb1681b7
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/controller/pcie-apple.c
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@ -219,7 +219,7 @@ static int apple_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
if (hwirq < 0)
return -ENOSPC;
fwspec.param[1] += hwirq;
fwspec.param[fwspec.param_count - 2] += hwirq;
ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &fwspec);
if (ret)