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

[Bjorn Helgaas]

On Thu, Feb 19, 2026 at 03:09:59PM -0700, Matthew W Carlis wrote:
> On Thu, 19 Feb 2026, Bjorn Helgaas wrote:
> 
> > Applied to pci/enumeration for v7.1, thanks.  This will be rebased
> > after v7.0-rc1.
> 
> We're heading down a path here where we keep working around the
> work-around & now have decided that the kernel will be meddling with
> the link on potentially all of the PCIe devices in the world. The
> trade off that we're making here to accommodate a device specific
> interaction doesn't seem like the right direction. 
> 
> Can we reconsider my patch that restricts the link retrain mechanism
> to the specific device that created the work-around?
> https://lore.kernel.org/all/20250702052430.13716-1-mattc@xxxxxxxxxxxxxxx/

I think we already at least potentially meddle with the link on every
device, and it definitely makes me nervous.  I would like it much
better if it's possible to limit it to devices with known defects.

I'll defer these for now and we can see if a consensus emerges.