Re: [PATCH 1/2] PCI: Setup bridge resources earlier

Bhanu Seshu Kumar Valluri
2025-10-27T08:10:15Z

On 21/10/25 00:16, Ilpo Järvinen wrote:
> On Sat, 18 Oct 2025, Bhanu Seshu Kumar Valluri wrote:
>
>> On 18/10/25 00:22, Bjorn Helgaas wrote:
>>> On Fri, Oct 17, 2025 at 11:52:58PM +0530, Bhanu Seshu Kumar Valluri wrote:
>>>>
>>>> I want to report that this PATCH also break PCI RC port on TI-AM64-EVM.
>>>>
>>>> I did git bisect and it pointed to the a43ac325c7cb ("PCI: Set up bridge resources earlier")
>>>>
>>>> Happy to help if any testing or logs are required.
>>>
>>> Thanks for the report! Can you test this patch?
>>>
>>> https://patch.msgid.link/20251014163602.17138-1-ilpo.jarvinen@linux.intel.com
>>>
>>> That patch is queued up as
>>> https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/commit/?id=469276c06aff
>>> and should appear in v6.18-rc2 on Sunday if all goes well.
>>>
>>> If that doesn't work, let us know and we'll debug this further.
>>
>> I applied above patch on top of commit f406055cb18c ("Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux")
>>
>> Did pci rescan and run kselftest (pci_endpoint_test). It is working.
>>
>> Thanks for the patch.
>
> Thanks for testing the revert.
>
>> Happy to help if any testing or logs are required.
>
> I'd be interested to understand what goes wrong with the change I was
> trying to make as I want to attempt the same change later, but with all
> known issues solved by supporting changes, obviously :-).
>
> The log snippets you provided are unfortunately too short to contain all
> the necessary information (missing e.g. root bus resources and possibly
> other helpful details).
>
> So if you could provide dmesg and /proc/iomem contents from broken and
> working (with the revert) cases to let me easily compare them, that would
> help. Please take the dmesg with dyndbg="file drivers/pci/*.c +p" on
> kernel's cmdline.
>
> No further actions needed beyond that until later if I need to test some
> of those supporting changes before retrying all this in the mainline. It
> may take some time, even more than one kernel cycle as there have been
> quite many regressions.
>
>
Hi

I captured logs with dyndbg="file drivers/pci/*.c +p. See the links below.

Working kernel logs
https://github.com/bhanuseshukumar/kernel_logs/blob/main/working_log

Non Working kernel logs
https://github.com/bhanuseshukumar/kernel_logs/blob/main/not_working_log

Happy to help if any testing or logs are required.

Regards,
Bhanu Seshu Kumvar Valluri