From a13c81952444d032ad3b5b7027b330150dbe2408 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Fri, 25 Apr 2008 15:03:18 +0200 Subject: [PATCH] ns9xxx: fix handle_prio_irq to unmask irqs with lower priority MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 --- arch/arm/mach-ns9xxx/irq.c | 15 +++++++++------ 1 file 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 -- 2.20.1