Recover from an interupt flood by propagating the end of interrupt state. 

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---
 hw/apic.c |   23 +++++++++++++++++++++--
 hw/pc.c   |    2 +-
 2 files changed, 22 insertions(+), 3 deletions(-)

Index: qemu/hw/apic.c
===================================================================
--- qemu.orig/hw/apic.c
+++ qemu/hw/apic.c
@@ -332,6 +332,26 @@ static void apic_set_irq(APICState *s, i
     apic_update_irq(s);
 }
 
+struct IOAPICState *ioapic;
+/* XXX Multi IOAPIC support */
+static void apic_propogate_eoi(int vector) {
+    uint32_t irr;
+    int pin;
+
+    if ((vector < 0x10) || (vector > 0xfe))
+        return;
+
+    irr = ioapic->irr;
+    while (irr) {
+        pin = ffs_bit(irr);
+        irr &= ~(1 << pin);
+        if ((ioapic->ioredtbl[pin] & 0xff) == vector) {
+            ioapic->irr &= ~(1 << pin);
+            break;
+        }
+    }
+}
+
 static void apic_eoi(APICState *s)
 {
     int isrv;
@@ -339,8 +359,7 @@ static void apic_eoi(APICState *s)
     if (isrv < 0)
         return;
     reset_bit(s->isr, isrv);
-    /* XXX: send the EOI packet to the APIC bus to allow the I/O APIC to
-            set the remote IRR bit for level triggered interrupts. */
+    apic_propogate_eoi(isrv);
     apic_update_irq(s);
 }
 
Index: qemu/hw/pc.c
===================================================================
--- qemu.orig/hw/pc.c
+++ qemu/hw/pc.c
@@ -36,7 +36,7 @@
 static fdctrl_t *floppy_controller;
 static RTCState *rtc_state;
 static PITState *pit;
-static IOAPICState *ioapic;
+extern IOAPICState *ioapic;
 static PCIDevice *i440fx_state;
 
 static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)