[patch 33/45] KVM: Fix coalesced interrupt reporting in IOAPIC

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Gleb Natapov <gleb@xxxxxxxxxx>

commit 65a82211636f156a276cac3f8665605ae18f371f upstream.

This bug was introduced by b4a2f5e723e4f7df467.

Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx>
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 virt/kvm/ioapic.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -188,6 +188,8 @@ int kvm_ioapic_set_irq(struct kvm_ioapic
 			if ((edge && old_irr != ioapic->irr) ||
 			    (!edge && !entry.fields.remote_irr))
 				ret = ioapic_service(ioapic, irq);
+			else
+				ret = 0; /* report coalesced interrupt */
 		}
 	}
 	return ret;


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