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ns9xxx: make use of the chip's irq priorisation
The irq controller automatically masks the current and all lower prioritised tasks until the current irq is acked. Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
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parent
a287453e37
commit
5e69b945f2
1 changed files with 39 additions and 1 deletions
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@ -9,6 +9,7 @@
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* the Free Software Foundation.
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*/
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include <asm/io.h>
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#include <asm/mach/irq.h>
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#include <asm/mach-types.h>
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@ -52,6 +53,43 @@ static struct irq_chip ns9xxx_chip = {
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.unmask = ns9xxx_unmask_irq,
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};
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#if 0
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#define handle_irq handle_level_irq
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#else
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void handle_prio_irq(unsigned int irq, struct irq_desc *desc)
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{
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unsigned int cpu = smp_processor_id();
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struct irqaction *action;
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irqreturn_t action_ret;
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spin_lock(&desc->lock);
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if (unlikely(desc->status & IRQ_INPROGRESS))
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goto out_unlock;
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desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
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kstat_cpu(cpu).irqs[irq]++;
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action = desc->action;
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if (unlikely(!action || (desc->status & IRQ_DISABLED)))
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goto out_unlock;
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desc->status |= IRQ_INPROGRESS;
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spin_unlock(&desc->lock);
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action_ret = handle_IRQ_event(irq, action);
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spin_lock(&desc->lock);
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desc->status &= ~IRQ_INPROGRESS;
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if (!(desc->status & IRQ_DISABLED) && desc->chip->ack)
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desc->chip->ack(irq);
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out_unlock:
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spin_unlock(&desc->lock);
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}
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#define handle_irq handle_prio_irq
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#endif
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void __init ns9xxx_init_irq(void)
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{
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int i;
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@ -69,7 +107,7 @@ void __init ns9xxx_init_irq(void)
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for (i = 0; i <= 31; ++i) {
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set_irq_chip(i, &ns9xxx_chip);
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set_irq_handler(i, handle_level_irq);
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set_irq_handler(i, handle_irq);
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set_irq_flags(i, IRQF_VALID);
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}
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}
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