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PCI: apple: Change MSI handling to handle 4-cell AIC fwspec form
author
Hector Martin
<marcan@marcan.st>
Wed, 9 Mar 2022 19:21:17 +0000
(
04:21
+0900)
committer
Marc Zyngier
<maz@kernel.org>
Thu, 10 Mar 2022 09:49:03 +0000
(09:49 +0000)
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
drivers/pci/controller/pcie-apple.c
patch
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diff --git
a/drivers/pci/controller/pcie-apple.c
b/drivers/pci/controller/pcie-apple.c
index
854d951
..
a2c3c20
100644
(file)
--- a/
drivers/pci/controller/pcie-apple.c
+++ b/
drivers/pci/controller/pcie-apple.c
@@
-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)