diff options
| author | Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> | 2008-04-25 17:03:18 +0400 |
|---|---|---|
| committer | Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> | 2008-04-25 17:45:08 +0400 |
| commit | a13c81952444d032ad3b5b7027b330150dbe2408 (patch) | |
| tree | 64192f50fdb19adb8dd5b2705daf6029578b8faf | |
| parent | 5e69b945f20aec17bf057acbb61b6682461e7149 (diff) | |
| download | linux-a13c81952444d032ad3b5b7027b330150dbe2408.tar.xz | |
ns9xxx: fix handle_prio_irq to unmask irqs with lower priority
When an irq is reported all lower prio irqs are masked until the current
irq is acked. So never leave handle_prio_irq without acking.
desc->status & IRQ_INPROGRESS should never become true because the current
irq is masked until it is acked, too.
Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
| -rw-r--r-- | arch/arm/mach-ns9xxx/irq.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/arm/mach-ns9xxx/irq.c b/arch/arm/mach-ns9xxx/irq.c index 7ddc8fde7748..ba7a9e4888f0 100644 --- a/arch/arm/mach-ns9xxx/irq.c +++ b/arch/arm/mach-ns9xxx/irq.c @@ -64,15 +64,14 @@ void handle_prio_irq(unsigned int irq, struct irq_desc *desc) spin_lock(&desc->lock); - if (unlikely(desc->status & IRQ_INPROGRESS)) - goto out_unlock; + BUG_ON(desc->status & IRQ_INPROGRESS); desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); kstat_cpu(cpu).irqs[irq]++; action = desc->action; if (unlikely(!action || (desc->status & IRQ_DISABLED))) - goto out_unlock; + goto out_mask; desc->status |= IRQ_INPROGRESS; spin_unlock(&desc->lock); @@ -81,10 +80,14 @@ void handle_prio_irq(unsigned int irq, struct irq_desc *desc) spin_lock(&desc->lock); desc->status &= ~IRQ_INPROGRESS; - if (!(desc->status & IRQ_DISABLED) && desc->chip->ack) - desc->chip->ack(irq); -out_unlock: + if (desc->status & IRQ_DISABLED) +out_mask: + desc->chip->mask(irq); + + /* ack unconditionally to unmask lower prio irqs */ + desc->chip->ack(irq); + spin_unlock(&desc->lock); } #define handle_irq handle_prio_irq |