linux-kernel - Re: [PATCH V4 05/26] agp: nvidia: deprecate pci_get_bus_and

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Date:   Tue, 30 Jan 2018 08:43:37 +1000
From:   Dave Airlie <airlied@...il.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Sinan Kaya <okaya@...eaurora.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Airlie <airlied@...ux.ie>,
        Linux PCI <linux-pci@...r.kernel.org>, timur@...eaurora.org,
        open list <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V4 05/26] agp: nvidia: deprecate pci_get_bus_and_slot()

On 30 January 2018 at 08:38, Bjorn Helgaas <helgaas@...nel.org> wrote:
> On Tue, Jan 30, 2018 at 07:43:21AM +1000, Dave Airlie wrote:
>> On 3 January 2018 at 22:44, Sinan Kaya <okaya@...eaurora.org> wrote:
>> > On 12/19/2017 12:37 AM, Sinan Kaya wrote:
>> >> pci_get_bus_and_slot() is restrictive such that it assumes domain=0 as
>> >> where a PCI device is present. This restricts the device drivers to be
>> >> reused for other domain numbers.
>>
>> So not a major problem, but it would be pretty much impossible for either
>> of these agp drivers to be used in any other domain ever.
>>
>> What does this buy us, maybe just rename pci_get_bus_and_slot to
>> pci_get_domain0_bus_and_slot as a helper, or just pass the pdev in
>> and have it do the right thing always.
>
> I already have this patch on my "next" branch, planned for the v4.16
> merge window, so it's done unless you have a major objection.

Yeah I don't really care either way, I just can't seen the point in changing
agp drivers that definitely will never see a domain, but if it gets
rid of a dumb API,
so be it.

Dave.