Re: [PATCH v3] PCI: Skip Target Speed quirk on clamped ports with no link

On Mon, 3 Aug 2026, Thorsten Leemhuis wrote:

> > Since commit 72780f796468 ("PCI: Always lift 2.5GT/s restriction in PCIe
> > failed link retraining") the Target Speed quirk lifts a firmware-imposed
> > 2.5GT/s restriction on any downstream port, without checking whether the
> > link is up.  Where nothing is plugged in, the retraining that follows can
> > never complete, so each attempt costs PCIE_LINK_RETRAIN_TIMEOUT_MS.  The
> > quirk makes two of them -- the initial one and the restore on the error
> > path -- adding a fixed 2 s to every boot.
> 
> TWIMC, this patch fixes a regression Edward reported here:
> https://bugzilla.kernel.org/show_bug.cgi?id=221801

 Thank you for the pointer.

 As it happens attempts were made to cc me on that bug, which however went 
nowhere as messages were sent to my long-defunct <[email protected]> 
e-mail address, a clear oversight of mine as I went, back in the day, 
through numerous sites to get this updated.

 I have now asked bugzilla admins to help me recover my account.

> [side note: the report could be more specific, yes -- I wanted to ask
> Edward to clarify a few things (like the actual slowdown) before
> forwarding it, but it didn't came to that when I noticed this patch and
> asked Edward to just check if it helped -- which is did.]

 Tested-by tags welcome!

 And thank you for your input overall, really useful and appreciated!

  Maciej