Re: [PATCH v2 0/3] PCI: Always lift 2.5GT/s restriction in PCIe failed link retraining

Re: [PATCH v2 0/3] PCI: Always lift 2.5GT/s restriction in PCIe failed link retraining

[Bjorn Helgaas]

[cc->to: Matthew]

On Mon, Dec 08, 2025 at 07:24:23PM +0000, Maciej W. Rozycki wrote:
> Hi,
> 
>  I've figured out that backporting will be less intrusive if an update to 
> use `->supported_speeds' is posted as a separate follow-up change.  So it 
> is now 2/3 in this series, after 1/3 comprising the original patch, only 
> trivially updated.  Then 3/3 moves the maximum link speed determination 
> earlier on for an early exit in the PCIE_SPEED_2_5GT case; maybe unlikely, 
> but essentially free now, now that we retrieve the speed anyway, and makes 
> code a little simpler yet.
> 
>  Please let me know if you'd prefer me to fold 2/3 into 1/3 after all.
> 
>  Previous iterations:
> 
> - v1 at: <https://lore.kernel.org/r/alpine.DEB.2.21.2511290245460.36486@angie.orcam.me.uk/>.

Applied to pci/enumeration for v7.2, thanks!

Matthew, I know you saw issues with some NVMe devices [1], but I'm not
clear on whether you've tested any of those devices with this series.

If you have a chance to test the series, it would be great to know
whether it helps.

[1] https://lore.kernel.org/all/20250702052430.13716-2-mattc@purestorage.com/