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xen/pci: Move the allocation of IRQs when there are no IOAPIC's to the end

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.. which means we can preset of NR_IRQS_LEGACY interrupts using
the 'acpi_get_override_irq' API before this loop.
This means that we can get the IRQ's polarity (and trigger) from either
the ACPI (or MP); or use the default values. This fixes a bug if we did
not have an IOAPIC we would not been able to preset the IRQ's polarity
if the MP table existed.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2011-06-06 14:20:35 -04:00
parent a0ee056709
commit 9b6519db5e
1 changed files with 9 additions and 12 deletions
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21
arch/x86/pci/xen.c
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@ -441,18 +441,6 @@ int __init pci_xen_initial_domain(void)
#ifdef CONFIG_ACPI
xen_setup_acpi_sci();
__acpi_register_gsi = acpi_register_gsi_xen;
#endif
if (0 == nr_ioapics) {
for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
pirq = xen_allocate_pirq_gsi(irq);
if (WARN(pirq < 0,
"Could not allocate PIRQ for legacy interrupt\n"))
break;
irq = xen_bind_pirq_gsi_to_irq(irq, pirq, 0, "xt-pic");
}
return 0;
}
#ifdef CONFIG_ACPI
/* Pre-allocate legacy irqs */
for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
int trigger, polarity;
@ -465,6 +453,15 @@ int __init pci_xen_initial_domain(void)
true /* allocate IRQ */);
}
#endif
if (0 == nr_ioapics) {
for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
pirq = xen_allocate_pirq_gsi(irq);
if (WARN(pirq < 0,
"Could not allocate PIRQ for legacy interrupt\n"))
break;
irq = xen_bind_pirq_gsi_to_irq(irq, pirq, 0, "xt-pic");
}
}
return 0;
}