Re: [PATCH v2] genirq: spurious irq detection for threaded irqs

[Thomas Gleixner]

On Fri, 5 Mar 2010, Uwe Kleine-KÃnig wrote:

> For threaded irqs the top half returns IRQ_WAKE_THREAD.  Don't treat
> that value like IRQ_HANDLED for the spurious check.  Instead check the
> return value of the threaded handler to be able to detect stuck irqs
> that only have threaded handlers and no top half that can detect the
> problem.
> 
> Signed-off-by: Uwe Kleine-KÃnig <u.kleine-koenig@xxxxxxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxx>
> ---
> Hello,
> 
> changed since v1:
> 
>  - use note_interrupt for the threaded handler's return value, getting rid of
>    note_threaded_interrupt.  The only downside is that a threaded handler
>    returning IRQ_WAKE_THREAD remains uncatched now.

Well that's easy to fix.
 
> +			if (!noirqdebug)
> +				note_interrupt(action->irq, desc, action_ret);

  				note_interrupt(action->irq, desc,
  					       action_ret & ~IRQ_WAKE_THREAD);
Thanks,

	tglx