--- io_apic.c.zby	2010-05-16 23:17:36.000000000 +0200
+++ io_apic.c	2010-07-10 21:27:55.000000000 +0200
@@ -74,6 +74,10 @@
  */
 int sis_apic_bug = -1;
 
+bool noFastEoiHandler = 0;
+#define MAX_LVL_IRQS_NR 24
+int irq_lvl_required[MAX_LVL_IRQS_NR];
+
 static DEFINE_RAW_SPINLOCK(ioapic_lock);
 static DEFINE_RAW_SPINLOCK(vector_lock);
 
@@ -123,6 +127,27 @@
 }
 early_param("noapic", parse_noapic);
 
+static int __init parse_NoFastEoiApic(char *str)
+{
+	/* replace the default fasteoi interrupt handler with level one */
+	noFastEoiHandler = 1;
+	return 0;
+}
+early_param("nofasteoiapic", parse_NoFastEoiApic);
+
+static int __init parse_NoFastEoiApicAt(char *str)
+{
+	/* Reset level int table to default -1 */
+	int i;
+	for(i = 0; i < 24; i++) irq_lvl_required[i] = -1; 
+	/* force level handler for irqs instead default fasteoi */
+	get_options(&str, MAX_LVL_IRQS_NR, irq_lvl_required);
+	for(i = 0; i < 24; i++) apic_printk(APIC_VERBOSE, KERN_INFO
+                        "Interrupt table: position %d value %d\n", i, irq_lvl_required[i]);
+	return 0;
+}
+early_param("nofasteoiapic=", parse_NoFastEoiApicAt);
+
 struct irq_pin_list {
 	int apic, pin;
 	struct irq_pin_list *next;
@@ -1326,6 +1351,21 @@
 }
 #endif
 
+int CheckLevelNeeded(int irq)
+{
+/* Looks if level irq is on the list */
+	int i, result = 0;
+	for(i = 0; i < MAX_LVL_IRQS_NR; i++)
+	{
+		if(irq_lvl_required[i] == irq) result = irq;
+		if(irq_lvl_required[i] < 1) result = 0;
+	}
+	apic_printk(APIC_VERBOSE, KERN_INFO, "Interrupt found %d.\n", result);
+	return result;
+}
+ 
+
+
 static void ioapic_register_intr(int irq, struct irq_desc *desc, unsigned long trigger)
 {
 
@@ -1348,10 +1388,21 @@
 	}
 
 	if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
-	    trigger == IOAPIC_LEVEL)
+	    trigger == IOAPIC_LEVEL) {
+	   if (noFastEoiHandler)
+		set_irq_chip_and_handler_name(irq, &ioapic_chip,
+					      handle_level_irq,
+					      "level");
+	   else if (CheckLevelNeeded(irq)) {
+		set_irq_chip_and_handler_name(irq, &ioapic_chip,
+					      handle_level_irq,
+					      "level");
+			}
+	   else
 		set_irq_chip_and_handler_name(irq, &ioapic_chip,
 					      handle_fasteoi_irq,
 					      "fasteoi");
+		}
 	else
 		set_irq_chip_and_handler_name(irq, &ioapic_chip,
 					      handle_edge_irq, "edge");