Problem with MPC8536 and external IRQs when using a loadable kernel module

[Mark Pearson]

Magical - thank you very very much. The patch fixes the problem

Really appreciate the quick response - and I would never have found that in a million years.

Mark

-----Original Message-----
From: Michael Ellerman [mailto:michael at ellerman.id.au] 
Sent: Thursday, December 09, 2010 6:33 PM
To: Mark Pearson
Cc: linuxppc-dev at lists.ozlabs.org
Subject: Re: Problem with MPC8536 and external IRQs when using a loadable kernel module

On Thu, 2010-12-09 at 12:45 -0800, Mark Pearson wrote:
> I have a curious problem. This is on a MPC8636 based platform with 
> 36-bit address space (that may or may not be important).
> 
>  
> 
> I have a very simple driver that registers for one of the external 
> IRQs with a trivial interrupt handler. It works great when built in as 
> part of the kernel.
> 
>  
> 
> However, if I make it a loadable module I get the crash shown below 
> (blade_irq is my IRQ handler).
> 
>  
> 
> -----Console capture ----------------------------------------
> 
> Unable to handle kernel paging request for instruction fetch
                                            ^^^^^^^^^^^^^^^^^

Your interrupt handler isn't mapped executable? Something wrong with module loading?

Do you need 78e2e68a2b79f394b7cd61e07987a8a89af907f7 ?

cheers



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