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authorAvi Kivity <avi@redhat.com>2010-12-31 10:52:15 +0200
committerAvi Kivity <avi@redhat.com>2011-01-02 11:52:48 +0200
commitd0dfc6b74a0c6e9ee46b62713256e2b025244d3c (patch)
treea065d54c18eaa687762e032dd46c28d4affff3b1 /arch/x86/kvm/i8259.c
parent649497d1a3676020802ebba04a3d9bb31253adb5 (diff)
KVM: i8259: initialize isr_ack
isr_ack is never initialized. So, until the first PIC reset, interrupts may fail to be injected. This can cause Windows XP to fail to boot, as reported in the fallout from the fix to https://bugzilla.kernel.org/show_bug.cgi?id=21962. Reported-and-tested-by: Nicolas Prochazka <prochazka.nicolas@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r--arch/x86/kvm/i8259.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index f628234fbeca..3cece05e4ac4 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -575,6 +575,8 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm)
s->pics[1].elcr_mask = 0xde;
s->pics[0].pics_state = s;
s->pics[1].pics_state = s;
+ s->pics[0].isr_ack = 0xff;
+ s->pics[1].isr_ack = 0xff;
/*
* Initialize PIO device