diff -urN -X ignore orig/linux-2.4.21-pre4/arch/mips/vr41xx/common/giu.c new/linux-2.4.21-pre4/arch/mips/vr41xx/common/giu.c
--- orig/linux-2.4.21-pre4/arch/mips/vr41xx/common/giu.c	Wed Apr 16 21:59:34 2003
+++ new/linux-2.4.21-pre4/arch/mips/vr41xx/common/giu.c	Tue Feb 10 09:18:34 2004
@@ -217,7 +217,9 @@
 	unsigned int retval = 0;
 	int giuint_irq, cascade_irq;
 
+#if 0
 	disable_irq(GIUINT_CASCADE_IRQ);
+#endif
 	cascade = &giuint_cascade[pin];
 	giuint_irq = pin + GIU_IRQ(0);
 	if (cascade->flag == GIUINT_CASCADE) {
@@ -228,7 +230,9 @@
 		enable_irq(giuint_irq);
 	} else
 		retval = do_IRQ(giuint_irq, regs);
+#if 0
 	enable_irq(GIUINT_CASCADE_IRQ);
+#endif
 
 	return retval;
 }