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authorMarc Zyngier <marc.zyngier@arm.com>2017-11-16 20:58:19 +0300
committerChristoffer Dall <christoffer.dall@linaro.org>2017-11-29 18:46:16 +0300
commita05d1c0d03fd60ed487991e73850421e735c0135 (patch)
treed655239c4520daf82da3e90abfaa2746154ccf9b /virt
parent686f294f2f1ae40705283dd413ca1e4c14f20f93 (diff)
downloadlinux-a05d1c0d03fd60ed487991e73850421e735c0135.tar.xz
KVM: arm/arm64: vgic-v4: Only perform an unmap for valid vLPIs
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>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/vgic/vgic-v4.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v4.c b/virt/kvm/arm/vgic/vgic-v4.c
index 53c324aa44ef..4a37292855bc 100644
--- a/virt/kvm/arm/vgic/vgic-v4.c
+++ b/virt/kvm/arm/vgic/vgic-v4.c
@@ -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);