diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 6e31e935bb31..36bba3027735 100644
--- a/arch/blackfin/kernel/irqchip.c
+++ b/arch/blackfin/kernel/irqchip.c
@@ -38,38 +38,15 @@
 #include <asm/pda.h>
 
 static atomic_t irq_err_count;
-static spinlock_t irq_controller_lock;
-
-/*
- * Dummy mask/unmask handler
- */
-void dummy_mask_unmask_irq(unsigned int irq)
-{
-}
-
 void ack_bad_irq(unsigned int irq)
 {
 	atomic_inc(&irq_err_count);
 	printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
 }
 
-static struct irq_chip bad_chip = {
-	.ack = dummy_mask_unmask_irq,
-	.mask = dummy_mask_unmask_irq,
-	.unmask = dummy_mask_unmask_irq,
-};
-
-static int bad_stats;
 static struct irq_desc bad_irq_desc = {
-	.status = IRQ_DISABLED,
-	.chip = &bad_chip,
 	.handle_irq = handle_bad_irq,
-	.depth = 1,
 	.lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock),
-	.kstat_irqs = &bad_stats,
-#ifdef CONFIG_SMP
-	.affinity = CPU_MASK_ALL
-#endif
 };
 
 #ifdef CONFIG_CPUMASK_OFFSTACK
@@ -119,21 +96,13 @@ __attribute__((l1_text))
 #endif
 asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 {
-	struct pt_regs *old_regs;
-	struct irq_desc *desc = irq_desc + irq;
 #ifndef CONFIG_IPIPE
 	unsigned short pending, other_ints;
 #endif
-	old_regs = set_irq_regs(regs);
-
-	/*
-	 * Some hardware gives randomly wrong interrupts.  Rather
-	 * than crashing, do something sensible.
-	 */
-	if (irq >= NR_IRQS)
-		desc = &bad_irq_desc;
+	struct pt_regs *old_regs = set_irq_regs(regs);
 
 	irq_enter();
+
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
 	/* Debugging check for stack overflow: is there less than STACK_WARN free? */
 	{
@@ -149,7 +118,15 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 		}
 	}
 #endif
-	generic_handle_irq(irq);
+
+	/*
+	 * Some hardware gives randomly wrong interrupts.  Rather
+	 * than crashing, do something sensible.
+	 */
+	if (irq >= NR_IRQS)
+		handle_bad_irq(irq, &bad_irq_desc);
+	else
+		generic_handle_irq(irq);
 
 #ifndef CONFIG_IPIPE
 	/*
@@ -173,14 +150,6 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 
 void __init init_IRQ(void)
 {
-	struct irq_desc *desc;
-	int irq;
-
-	spin_lock_init(&irq_controller_lock);
-	for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++) {
-		*desc = bad_irq_desc;
-	}
-
 	init_arch_irq();
 
 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND