lkml.org 
[lkml]   [2010]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 2/4] genirq: Inform handler about line sharing state
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


\
 
 \ /
  Last update: 2010-12-17 11:51    [W:0.063 / U:0.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site