To use wake_up_interruptible in ISR

[Anish Kumar]

> On May 25, 2015, at 10:02 PM, 김찬 <ckim at etri.re.kr> wrote:
> 
> Hello,
> 
> I see in the source (linux ver 3.3) that wake_up_interruptible function doesn't sleep so I used in it an ISR but I'm getting 'BUG:scheduling while atomic' message. (I'm not sure it's coming from this)

Remove it and check if the problem goes away.
> I'm looking for the exact cause but Is there any caveat when using wake_up_interruptible() in an ISR?  (I found some drivers use it in ISR, some use it in work_struct)
> 

I think there should be no problem using this api in isr context.
> I also read in http://www.slideshare.net/rampalliraj/tasklet-vs-work-queues?from_action=save  that tasklet is not allowed to sleep but work is. (because  tasklet is not in process context, but in bottom-half)
> I don't know if I have to move the wake_up_interruptible function to tasklet or work(queue) or even it matters to the current problem.
> 
> Any help would be greatly appreciated. 

What are you trying to achieve.
> Regards,
> 
> Chan
> 
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