linux-kernel - Re: [PATCH V4 02/26] powerpc/PCI: deprecate pci_get_bus_and

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Date:   Tue, 19 Dec 2017 07:24:39 -0500
From:   Sinan Kaya <okaya@...eaurora.org>
To:     Michael Ellerman <mpe@...erman.id.au>, linux-pci@...r.kernel.org,
        timur@...eaurora.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>,
        Rob Herring <robh@...nel.org>,
        Bhumika Goyal <bhumirks@...il.com>,
        "open list:LINUX FOR POWERPC (32-BIT AND 64-BIT)" 
        <linuxppc-dev@...ts.ozlabs.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 02/26] powerpc/PCI: deprecate pci_get_bus_and_slot()

On 12/19/2017 5:29 AM, Michael Ellerman wrote:
> Sinan Kaya <okaya@...eaurora.org> writes:
> 
>> 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.
>>
>> Getting ready to remove pci_get_bus_and_slot() function in favor of
>> pci_get_domain_bus_and_slot().
>>
>> Use pci_get_domain_bus_and_slot() with a domain number of 0 as the code
>> is not ready to consume multiple domains and existing code used domain
>> number 0.
>>
>> Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
>> ---
>>  arch/powerpc/kernel/pci_32.c              | 3 ++-
>>  arch/powerpc/platforms/powermac/feature.c | 2 +-
>>  arch/powerpc/sysdev/mv64x60_pci.c         | 4 ++--
>>  3 files changed, 5 insertions(+), 4 deletions(-)
> 
> Looks to do what it says. I don't know if any of these call sites could
> be improved to provide the domain, but that's not really your problem.
> 

I tried to fix the places where I can at the rest of the series. I even took
a stab at fixing powerpc. There were places where the domain information was
not available and I couldn't locate where to extract it. I decided to leave it
as it is and hope that someone someday may expand the powerpc PCI adaptation. 

> Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)
> 
> cheers
> 


-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.