From 2c047956f3b27048883350c071bcd33ef8331d13 Mon Sep 17 00:00:00 2001
From: Igor Mammedov <imammedo@redhat.com>
Date: Fri, 13 Dec 2013 17:22:10 +0100
Subject: [PATCH] acpi: ich9: allow guest to clear SCI rised by GPE

it fixes IRQ storm since guest isn't able to lower SCI IRQ
after it has been handled when it clears GPE event.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/acpi/ich9.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index dcdef7c923..30f0df8713 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -61,6 +61,7 @@ static void ich9_gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
 {
     ICH9LPCPMRegs *pm = opaque;
     acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
+    acpi_update_sci(&pm->acpi_regs, pm->irq);
 }
 
 static const MemoryRegionOps ich9_gpe_ops = {