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KVM: Handle spurious acks for PIT interrupts

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Spurious acks can be generated, for example if the PIC is being reset.
Handle those acks gracefully rather than flooding the log with warnings.

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2008-08-17 16:03:46 +03:00
parent 85428ac7c3
commit dc7404cea3
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/i8254.c
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@ -228,7 +228,7 @@ void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
irq_ack_notifier);
spin_lock(&ps->inject_lock);
if (atomic_dec_return(&ps->pit_timer.pending) < 0)
WARN_ON(1);
atomic_inc(&ps->pit_timer.pending);
ps->irq_ack = 1;
spin_unlock(&ps->inject_lock);
}