RE: Interrupt Sharing

Mohamed Ghouse , Gurgaon (MohamedG@ggn.hcltech.com)
Wed, 25 Sep 2002 03:10:07 +0530


But what if two PCI Devices are sharing the same interrupt line?
Then how does the handler handle this?
Can you please explain this handling by the Kernel?

-MG

> -----Original Message-----
> From: Robert Love [mailto:rml@tech9.net]
> Sent: Wednesday, September 25, 2002 2:55 AM
> To: Mohamed "Ghouse , Gurgaon
> Cc: Linux-Kernel (E-mail)
> Subject: Re: Interrupt Sharing
>
>
> On Tue, 2002-09-24 at 17:19, Mohamed Ghouse , Gurgaon wrote:
>
> > Let me Re-Phrase the Question
> > The PCI Interrupts are shareable. How does the Operating
> System(Linux)
> > implement this?
>
> It does not have to do anything special, actually. If
> interrupt n comes
> in, then each handler registered on interrupt n is run.
>
> The incorrect handlers should check for work to do, see none, and
> return. The correct one will actually run.
>
> Robert Love
>
-
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