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Diffstat (limited to 'arch/blackfin/kernel/irqchip.c')
-rw-r--r--arch/blackfin/kernel/irqchip.c53
1 files changed, 11 insertions, 42 deletions
diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 6e31e935bb3..36bba302773 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