[PATCH 2/4] KVM: arm64: vgic-v4: Only WARN for HW IRQ mismatch when unmapping vLPI

[Oliver Upton <oliver.upton@linux.dev>]

The VMM or guest can easily screw up GICv4 vLPI injection by
misconfiguring the MSI or the virtual ITS. Don't fuss over it; limit the
WARN in vgic_v4_unset_forwarding() to fire in the worrying case where an
unrelated HW IRQ was mapped to a vLPI.

Reported-by: Sudheer Dantuluri <dantuluris@google.com>
Tested-by: Sudheer Dantuluri <dantuluris@google.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
 arch/arm64/kvm/vgic/vgic-v4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/vgic/vgic-v4.c b/arch/arm64/kvm/vgic/vgic-v4.c
index eedecbbbcf31..3e1de40720e0 100644
--- a/arch/arm64/kvm/vgic/vgic-v4.c
+++ b/arch/arm64/kvm/vgic/vgic-v4.c
@@ -512,7 +512,7 @@ int kvm_vgic_v4_unset_forwarding(struct kvm *kvm, int virq,
 	if (ret)
 		goto out;
 
-	WARN_ON(!(irq->hw && irq->host_irq == virq));
+	WARN_ON(irq->hw && irq->host_irq != virq);
 	if (irq->hw) {
 		atomic_dec(&irq->target_vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count);
 		irq->hw = false;
-- 
2.39.5