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    SubjectRe: [PATCH v3 43/59] KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPI
    On Mon, Jul 31, 2017 at 06:26:21PM +0100, Marc Zyngier wrote:
    > When freeing an LPI (on a DISCARD command, for example), we need
    > to unmap the VLPI down to the physical ITS level.
    >
    > Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
    > ---
    > virt/kvm/arm/vgic/vgic-its.c | 6 +++++-
    > 1 file changed, 5 insertions(+), 1 deletion(-)
    >
    > diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
    > index 40aeadef33fe..79bac93d3e7d 100644
    > --- a/virt/kvm/arm/vgic/vgic-its.c
    > +++ b/virt/kvm/arm/vgic/vgic-its.c
    > @@ -623,8 +623,12 @@ static void its_free_ite(struct kvm *kvm, struct its_ite *ite)
    > list_del(&ite->ite_list);
    >
    > /* This put matches the get in vgic_add_lpi. */
    > - if (ite->irq)
    > + if (ite->irq) {
    > + if (ite->irq->hw)
    > + its_unmap_vlpi(ite->irq->host_irq);

    nit: should we raise a warning on a bad return value?

    Otherwise:

    Acked-by: Christoffer Dall <cdall@linaro.org>

    > +
    > vgic_put_irq(kvm, ite->irq);
    > + }
    >
    > kfree(ite);
    > }
    > --
    > 2.11.0
    >

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