[COMMIT master] KVM: Fix coalesced interrupt reporting in IOAPIC

[Avi Kivity]

From: Gleb Natapov <g...@redhat.com>

This bug was introduced by b4a2f5e723e4f7df46731106faf9e2405673c073

Signed-off-by: Gleb Natapov <g...@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>

diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index e9de458..38a2d20 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -194,6 +194,8 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, 
int level)
                        if ((edge && old_irr != ioapic->irr) ||
                            (!edge && !entry.fields.remote_irr))
                                ret = ioapic_service(ioapic, irq);
+                       else
+                               ret = 0; /* report coalesced interrupt */
                }
                trace_kvm_ioapic_set_irq(entry.bits, irq, ret == 0);
        }
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