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

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Message-ID: <6628a4b9-befe-4bb1-a72a-4e9085338598@163.com>
Date: Mon, 4 Aug 2025 23:04:06 +0800
From: Hans Zhang <18255117159@....com>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: Gerd Bayer <gbayer@...ux.ibm.com>, Manivannan Sadhasivam
 <mani@...nel.org>, Hans Zhang <hans.zhang@...tech.com>,
 Arnd Bergmann <arnd@...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>, Niklas Schnelle <schnelle@...ux.ibm.com>,
 geert@...ux-m68k.org
Subject: Re: [PATCH] PCI: Fix endianness issues in pci_bus_read_config()



On 2025/8/4 22:33, Bjorn Helgaas wrote:
> On Mon, Aug 04, 2025 at 11:06:36AM +0800, Hans Zhang wrote:
>> ...
> 
>> 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.
>>
>> Branch: ttps://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=capability-search
> 
> Since this series will now target v6.18, I'll watch for a complete v15
> series based on v6.17-rc1, with this fix and any typo or other fixes
> from pci/capability-search fully integrated.
> 
> Then that series can be tested and completely replace the current
> pci/capability-search branch.
> 

Dear Bjorn,

Here is the patch based on pci/capability-search branch. It's to discuss 
clearly how the final v15 should be modified. The final plan has been 
confirmed. I will submit the v15 version of this series based on v6.17-rc1.

Best regards,
Hans