Re: [PATCH v3 2/4] genirq: Inform handler about line sharing state

[Jan Kiszka]

Am 17.12.2010 11:41, Thomas Gleixner wrote:
> On Fri, 17 Dec 2010, Jan Kiszka wrote:
>> Am 17.12.2010 11:23, Thomas Gleixner wrote:
>>> OTOH, if we have to disable anyway, then we could simply keep it
>>> disabled across the installation of a new handler. That would make the
>>> notification business go away, wouldn't it ?
>>
>> No, the notification is still necessary in case the registered handler
>> keeps the line off after returning from both hard and threaded handler.
> 
> And how should that happen? If it is in oneshot mode then the line is
> reenabled when the thread handler returns.

disable_irq_nosync is called by the handler before returning. And it's
the handler's job to revert this, properly synchronizing it internally.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/