Messages in this thread Patch in this message | | | Date | Wed, 20 Apr 2016 14:15:01 +0100 (BST) | From | Stefano Stabellini <> | Subject | [PATCH] xen/x86: actually allocate legacy interrupts on PV guests |
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b4ff8389ed14 is incomplete: relies on nr_legacy_irqs() to get the number of legacy interrupts when actually nr_legacy_irqs() returns 0 after probe_8259A(). Use NR_IRQS_LEGACY instead.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index beac4df..349b8ce 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -491,8 +491,11 @@ int __init pci_xen_initial_domain(void) #endif __acpi_register_gsi = acpi_register_gsi_xen; __acpi_unregister_gsi = NULL; - /* Pre-allocate legacy irqs */ - for (irq = 0; irq < nr_legacy_irqs(); irq++) { + /* + * Pre-allocate the legacy IRQs. Use NR_LEGACY_IRQS here + * because we don't have a PIC and thus nr_legacy_irqs() is zero. + */ + for (irq = 0; irq < NR_IRQS_LEGACY; irq++) { int trigger, polarity; if (acpi_get_override_irq(irq, &trigger, &polarity) == -1)
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