Re: shared interrupts

From: Calin A. Culianu <calin_at_ajvar.org> · Date: Sun, 22 Jan 2006 12:52:21 -0500 (EST)

I thought comedi wouldn't let you use a driver in RT if the interrupt is 
shared?  It basically fails and prints a message to the kernel log to that 
effect.

However, I am not sure why that decision was made.  It normally is 
possible to share linux interrupts with RT interrupts if the drivers are 
written in such a way so as to support pending the interrupt to linux when 
it is not for them.  I just assume it's because the comedi drivers don't 
support this pending feature.

On Fri, 20 Jan 2006, Farhan Rizwi wrote:

>
> Hi,
>
> Are shared interrupts bad for RT?  When executing comedi_config, my ni driver
> is assigned irq 5 which is shared with yenta plus some human interface stuff,
> it warns. However, my application RTXI runs just fine?
>
> Thanks for any info
>
> -Farhan
>
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