linux-kernel - Re: [RFC PATCH V5 2/5] PCI/ACPI: Move ACPI ECAM mapping to generic MCFG driver

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Message-ID: <6ed71efa-e1fc-32bc-925d-454f93711e37@semihalf.com>
Date:   Tue, 6 Sep 2016 20:04:05 +0200
From:   Tomasz Nowicki <tn@...ihalf.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     arnd@...db.de, will.deacon@....com, catalin.marinas@....com,
        rafael@...nel.org, Lorenzo.Pieralisi@....com,
        hanjun.guo@...aro.org, okaya@...eaurora.org, jchandra@...adcom.com,
        cov@...eaurora.org, dhdang@....com, ard.biesheuvel@...aro.org,
        robert.richter@...iumnetworks.com, mw@...ihalf.com,
        Liviu.Dudau@....com, ddaney@...iumnetworks.com,
        wangyijing@...wei.com, msalter@...hat.com,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linaro-acpi@...ts.linaro.org, jcm@...hat.com,
        andrea.gallo@...aro.org, jeremy.linton@....com,
        liudongdong3@...wei.com, gabriele.paoloni@...wei.com,
        jhugo@...eaurora.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH V5 2/5] PCI/ACPI: Move ACPI ECAM mapping to generic
 MCFG driver

On 05.09.2016 04:22, Bjorn Helgaas wrote:
> On Mon, Aug 08, 2016 at 03:05:38PM +0200, Tomasz Nowicki wrote:
>> pci_acpi_setup_ecam_mapping() is not really ARM64 specific so move it out
>> of arch/arm64/ directory. In preparation for adding MCFG quirk handling
>> extend pci_acpi_setup_ecam_mapping() functionality to accept custom
>> PCI config accessors (function's argument).
>>
>> For ARM64 ACPI based PCI host controller we still use pci_generic_ecam_ops.
>
> I'm not sure we gain much by moving pci_acpi_setup_ecam_mapping() from
> arm64 code to generic code, since nobody else uses it yet.  But if you
> do want to move it, can you do the move (with no other change at all)
> in one patch, and add the new "ops" argument in a second patch?  I
> just don't want the "ops" change to get lost in the noise of the move.

Yes, will do.

Tomasz