linux-kernel - Re: [External] : [PATCH v2 3/3] PCI: Bail out early for 2.5GT/s devices in PCIe failed link retraining

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Message-ID: <15cb1eb4-3e9b-4495-ba00-cce10a10cf7b@oracle.com>
Date: Thu, 5 Feb 2026 16:27:56 +0530
From: ALOK TIWARI <alok.a.tiwari@...cle.com>
To: "Maciej W. Rozycki" <macro@...am.me.uk>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Matthew W Carlis <mattc@...estorage.com>
Cc: ashishk@...estorage.com, msaggi@...estorage.com, sconnor@...estorage.com,
        Lukas Wunner <lukas@...ner.de>,
        Ilpo Järvinen
 <ilpo.jarvinen@...ux.intel.com>,
        Jiwei <jiwei.sun.bj@...com>, guojinhui.liam@...edance.com,
        ahuang12@...ovo.com, sunjw10@...ovo.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [External] : [PATCH v2 3/3] PCI: Bail out early for 2.5GT/s
 devices in PCIe failed link retraining



On 12/9/2025 12:54 AM, Maciej W. Rozycki wrote:
> There's no point in retraining a failed 2.5GT/s device at 2.5GT/s, so
> just don't and return early.  While such devices might be unlikely to
> implement Link Active reporting, we need to retrieve the maximum link
> speed and use it in a conditional later on anyway, so the early check
> comes for free.
> 
> Signed-off-by: Maciej W. Rozycki<macro@...am.me.uk>
> ---
>   drivers/pci/quirks.c |    8 +++++---
>   1 file changed, 5 insertions(+), 3 deletions(-)


Tested-by: Alok Tiwari <alok.a.tiwari@...cle.com>

Tested with LTS 6.18.

Thanks,
Alok