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KVM: arm/arm64: vgic-v4: Only perform an unmap for valid vLPIs

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Before performing an unmap, let's check that what we have was
really mapped the first place.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier 2017-11-16 17:58:19 +00:00 committed by Christoffer Dall
parent 686f294f2f
commit a05d1c0d03
1 changed files with 4 additions and 2 deletions
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6
virt/kvm/arm/vgic/vgic-v4.c
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@ -337,8 +337,10 @@ int kvm_vgic_v4_unset_forwarding(struct kvm *kvm, int virq,
goto out;
WARN_ON(!(irq->hw && irq->host_irq == virq));
irq->hw = false;
ret = its_unmap_vlpi(virq);
if (irq->hw) {
irq->hw = false;
ret = its_unmap_vlpi(virq);
}
out:
mutex_unlock(&its->its_lock);