Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 28 Oct 2010 20:54:18 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH] genirq: handle shared irqs in handle_nested_irq() |
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On Thu, 28 Oct 2010, Rabin Vincent wrote:
> Allow shared irqs to work when nested threads are used for handling > threaded interrupts.
Why do we want this ? handle_nested_irq() is called from a interrupt demultiplexer, so why would we need shared interrupts for this ?
Thanks,
tglx
> Signed-off-by: Rabin Vincent <rabin@rab.in> > --- > kernel/irq/chip.c | 7 +++++-- > 1 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c > index baa5c4a..94a45a9 100644 > --- a/kernel/irq/chip.c > +++ b/kernel/irq/chip.c > @@ -418,8 +418,8 @@ static inline void unmask_irq(struct irq_desc *desc) > void handle_nested_irq(unsigned int irq) > { > struct irq_desc *desc = irq_to_desc(irq); > + irqreturn_t action_ret = IRQ_NONE; > struct irqaction *action; > - irqreturn_t action_ret; > > might_sleep(); > > @@ -434,7 +434,10 @@ void handle_nested_irq(unsigned int irq) > desc->status |= IRQ_INPROGRESS; > raw_spin_unlock_irq(&desc->lock); > > - action_ret = action->thread_fn(action->irq, action->dev_id); > + do { > + action_ret |= action->thread_fn(action->irq, action->dev_id); > + action = action->next; > + } while (action); > if (!noirqdebug) > note_interrupt(irq, desc, action_ret); > > -- > 1.7.2.3 >
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