linux-kernel - Re: [PATCH/RFC] powerpc: Fix mmap of PCI resource with hack for X

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Date:	Mon, 13 Nov 2006 21:07:50 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	benh@...nel.crashing.org
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	anton@...ba.org, airlied@...il.com, idr@...ibm.com,
	paulus@...ba.org
Subject: Re: [PATCH/RFC] powerpc: Fix mmap of PCI resource with hack for X

From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Date: Tue, 14 Nov 2006 12:59:54 +1100

> If I "fix" the kernel to do the right thing, that is pass BAR values in
> devices and expect BAR values in mmap, then I will break existing X
> setups on machines where PCI is not mapped 1:1 (that is mostly CHRP
> machines).
> 
> The problem I'm fixing in this patch is that while we were providing the
> hacked up value in "devices", we were expecting the BAR value in mmap,
> and there are apps expecting us to be consistent between the two, thus
> the breakage.

Ok, I don't see much alternatives for you then.  I have no real
objections to your patch.
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