linux-kernel - Re: [PATCH 1/3] PCI: Introduce pci_bus_addr

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Message-ID: <CAL_JsqLhteW8p1B7DrRzWzC_0UNYOKAU-yu2UhWRcb8PZ9AEnQ@mail.gmail.com>
Date:	Mon, 6 Apr 2015 08:05:33 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	David Ahern <david.ahern@...cle.com>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Russell King <linux@....linux.org.uk>,
	"linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>,
	David Miller <davem@...emloft.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/3] PCI: Introduce pci_bus_addr_t

On Sat, Apr 4, 2015 at 10:25 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
> On Sat, Apr 4, 2015 at 2:48 PM, Rob Herring <robherring2@...il.com> wrote:
>> On Sat, Apr 4, 2015 at 7:46 AM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
>
>>> I think there's still an unresolved question about the OF parsing code.
>>
>> Got a pointer to what that is? I'll take a guess. Generally, we make
>> the parsing code independent of the kernel addr sizes and use u64
>> types. The DT sizes and kernel sizes are not always aligned. For
>> example, an LPAE capable platform running a non-LPAE kernel build.
>
> Yep: http://lkml.kernel.org/r/1427857069-6789-3-git-send-email-yinghai@kernel.org
>
> Yinghai made a change to the sparc OF parsing code.  The question is
> whether a similar change should be made to clones of that code (two
> others in arch/sparc, one in arch/powerpc, and one in drivers/of).

Yes, it appears to me that is needed. At least the drivers/of/ code
does not distinguish 32 and 64 bit ATM.

Rob
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