diff options
| author | Stefano Stabellini <sstabellini@kernel.org> | 2016-04-20 14:15:01 +0100 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-06-06 19:11:12 -0400 |
| commit | baff1938adce472142447ba686c2bf84acfb1260 (patch) | |
| tree | d4f87d95ea0e09a1db2c588c0509a1e346920824 | |
| parent | 72895bf864d56ad4035f34b216b3344bb0fd6caa (diff) | |
xen/x86: actually allocate legacy interrupts on PV guests
[ Upstream commit 702f926067d2a4b28c10a3c41a1172dd62d9e735 ]
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>
CC: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | arch/x86/pci/xen.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 3c41716ea8ba..41c15dc4241c 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -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) |