netdev - Re: [PATCH] e1000e: test MSI interrupts

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Date:	Thu, 27 Mar 2008 16:06:33 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jesse.brandeburg@...el.com
Cc:	jeff@...zik.org, auke-jan.h.kok@...el.com,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org
Subject: Re: [PATCH] e1000e: test MSI interrupts

From: "Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Date: Thu, 27 Mar 2008 15:55:34 -0700

> David Miller wrote:
> > From: Jeff Garzik <jeff@...zik.org>
> > Date: Thu, 27 Mar 2008 15:43:42 -0400
> > 
> >> But that seems like a quick id test, with no need for all that
> >> generic MSI test code.
> > 
> > Yes, that is the way to do it.
> 
> I get your point, but this seems a maintainance problem due to not being
> able to "future proof" the solution.  I know what is (IDs) available
> now, but I don't know how many systems in the future IBM will release
> with a similar bridge but a different device ID that causes the same
> issue.  Should we take on the maintenance of continually having to add
> every new bridge device that has this issue to our driver?  Users just
> want this stuff to work when they plug it in.

This is exactly what the PCI quirks list is and it works just fine.

I know the truth is that Intel as a vendor frowns upon putting into
it's driver a list of another vendor's PCI IDs as errata items because
it looks bad.

So just be honest about that.

It is, however, the correct way to address this problem.

> tg3.c has exactly this kind of test and workaround (in fact its where I
> got the code) to work around the same kind of issues.

That is from an era when the situation was much different.
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