linux-kernel - Re: [PATCH] PCI: Fix endianness issues in pci_bus_read

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Message-ID: <96c686b7-2a42-4a1b-8cb6-07fd2ca1f5c1@163.com>
Date: Wed, 13 Aug 2025 15:50:33 +0800
From: Hans Zhang <18255117159@....com>
To: Niklas Schnelle <schnelle@...ux.ibm.com>,
 Gerd Bayer <gbayer@...ux.ibm.com>, Manivannan Sadhasivam <mani@...nel.org>,
 Hans Zhang <hans.zhang@...tech.com>
Cc: Arnd Bergmann <arnd@...nel.org>, Bjorn Helgaas <helgaas@...nel.org>,
 bhelgaas@...gle.com, Alexander Gordeev <agordeev@...ux.ibm.com>,
 Christian Borntraeger <borntraeger@...ux.ibm.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 jingoohan1@...il.com, Krzysztof Wilczyński
 <kwilczynski@...nel.org>, linux-kernel@...r.kernel.org,
 linux-s390@...r.kernel.org, linux-next <linux-next@...r.kernel.org>,
 linux-pci@...r.kernel.org, Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Rob Herring <robh@...nel.org>, geert@...ux-m68k.org
Subject: Re: [PATCH] PCI: Fix endianness issues in pci_bus_read_config()



On 2025/8/13 15:47, Niklas Schnelle wrote:
> On Tue, 2025-08-12 at 22:44 +0800, Hans Zhang wrote:
>>
>> On 2025/8/4 18:09, Gerd Bayer wrote:
>>> On Mon, 2025-08-04 at 11:06 +0800, Hans Zhang wrote:
>>>>
>>>> On 2025/8/1 19:30, Gerd Bayer wrote:
>>>>> On Fri, 2025-08-01 at 16:24 +0530, Manivannan Sadhasivam wrote:
>>>>>
>>>>> <--- snip --->
>>>>>
>>>>>>>>
>>>>
>>>> Dear all,
>>>>
>>>> According to the issue mentioned by Lukas and Mani. Gerd has already
>>>> been tested on the s390. I have tested it on the RK3588 and it works
>>>> fine. RK3588 uses Synopsys' PCIe IP, that is, the DWC driver. Our
>>>> company's is based on Cadence's PCIe 4.0 IP, and the test function is
>>>> normal. All the platforms I tested were based on ARM.
>>>>
>>>> The following is the patch based on the capability-search branch. May I
>>>> ask everyone, do you have any more questions?
>>>>
>>>> Gerd, if there's no problem, I'll add your Tested-by label.
>>>
>>> Before you add that I'd like to re-test with the "final" patch.
>>>
>>>> Branch:
>>>> https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=capability-search
>>>>
>>>> Patch:
>>>
>>> <--- snip --->
>>>
>>> Please bear with me while I'm working on that.
>>
>>
>> Dear Gerd,
>>
>> May I ask if there is any update?
>>
>>
>>
>> I plan to submit the v15 version of my series based on v6.17-rc1.
>> The modification method is like the previous comment:
>> https://lore.kernel.org/linux-pci/06012cc6-824d-4a7d-85c9-9995ec915382@163.com/
>>
>> Best regards,
>> Hans
>>
> 
> Hi Hans,
> 
> Gerd is currently out so I just gave the patch you provided against
> capability-search-v14 a try on s390. Didn't see any issues with the
> previously broken device probing. As I understand it Bjorn asked you to
> send a complete v15 and then for people to test that. I like that
> approach and would prefer to provide a Tested-by for v15 rather than
> via a patch on top. Gerd should be back next week too. Does that work
> for you?
> 

Hi Niklas,

Ok, no problem. I'm starting to prepare the patch for V15 now.

Best regards,
Hans