This is a note to let you know that I've just added the patch titled
xen/x86: actually allocate legacy interrupts on PV guests
to the 4.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xen-x86-actually-allocate-legacy-interrupts-on-pv-guests.patch
and it can be found in the queue-4.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 702f926067d2a4b28c10a3c41a1172dd62d9e735 Mon Sep 17 00:00:00 2001
From: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Date: Wed, 20 Apr 2016 14:15:01 +0100
Subject: xen/x86: actually allocate legacy interrupts on PV guests
From: Stefano Stabellini <sstabellini@xxxxxxxxxx>
commit 702f926067d2a4b28c10a3c41a1172dd62d9e735 upstream.
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@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/pci/xen.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- 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)
Patches currently in stable-queue which might be from sstabellini@xxxxxxxxxx are
queue-4.6/xen-x86-actually-allocate-legacy-interrupts-on-pv-guests.patch
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