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authorAvi Kivity <avi@redhat.com>2010-12-31 11:52:15 +0300
committerAvi Kivity <avi@redhat.com>2011-01-02 12:52:48 +0300
commitd0dfc6b74a0c6e9ee46b62713256e2b025244d3c (patch)
treea065d54c18eaa687762e032dd46c28d4affff3b1 /arch
parent649497d1a3676020802ebba04a3d9bb31253adb5 (diff)
downloadlinux-d0dfc6b74a0c6e9ee46b62713256e2b025244d3c.tar.xz
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')
-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