Commit 89eb1681 authored by Hector Martin's avatar Hector Martin Committed by Marc Zyngier
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PCI: apple: Change MSI handling to handle 4-cell AIC fwspec form 



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: default avatarHector Martin <marcan@marcan.st>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220309192123.152028-2-marcan@marcan.st
parent dfd42fac

drivers/pci/controller/pcie-apple.c

+1 −1
Original line number Diff line number Diff line
@@ -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)