From: Stefano Stabellini Date: Wed, 20 Apr 2016 13:15:01 +0000 (+0100) Subject: xen/x86: actually allocate legacy interrupts on PV guests X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=702f926067d2a4b28c10a3c41a1172dd62d9e735;p=deliverable%2Flinux.git xen/x86: actually allocate legacy interrupts on PV guests 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 CC: stable@vger.kernel.org --- diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index beac4dfdade6..349b8ce92bf2 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)