Re: PCI: failed link retraining quirk costs 1 s per empty AMD Promontory 21 port

[Tomasz Bojanowski]

> 04.10.2026 17:29 CEST Thorsten Leemhuis <regressions@xxxxxxxxxxxxx> napisał(a):
> Hmm, nobody replied afaics (or did I miss something), so it seems nobody
> has an idea what's wrong here. So I guess you need to perform a git
> bisection.

Thanks for following up.  You did not miss anything, there were no
replies so far.

I am not sure a bisection is possible though: I do not know of any
kernel where this does not happen.  I see the same 2 s delay on 7.1.x
(openSUSE) and on 7.2.x (Fedora), and I believe it was already there
on 6.19 and 7.0 as well, so I did not mean to report it as a
regression, sorry if the report read that way.  As far as I can tell
the quirk simply behaves as written: LBMS is set on a port with no
link, so the "broken device" branch is taken and the retrain times out.

I would be grateful for a hint from the PCI folks on whether this is
expected on empty ports.

Thanks,
Tomasz