KVM: Handle spurious acks for PIT interrupts

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

View File

@ -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);
}