Commit baff1938 authored by Stefano Stabellini's avatar Stefano Stabellini Committed by Sasha Levin

xen/x86: actually allocate legacy interrupts on PV guests

[ Upstream commit 702f9260 ]

b4ff8389 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: default avatarStefano Stabellini <sstabellini@kernel.org>
CC: stable@vger.kernel.org
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent 72895bf8
......@@ -466,8 +466,11 @@ 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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