linux-kernel - Re: [PATCH] PCI: Mark NVIDIA T4 GPUs to avoid bus reset

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Message-ID: <20230426081327.GA24855@L-PF27918B-1352.localdomain>
Date:   Wed, 26 Apr 2023 16:13:27 +0800
From:   Wu Zongyong <wuzongyong@...ux.alibaba.com>
To:     lukas@...ner.de, sdonthineni@...dia.com, bhelgaas@...gle.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     wllenyj@...ux.alibaba.com, wutu.xq2@...ux.alibaba.com,
        gerry@...ux.alibaba.com
Subject: Re: [PATCH] PCI: Mark NVIDIA T4 GPUs to avoid bus reset

On Mon, Apr 10, 2023 at 08:34:11PM +0800, Wu Zongyong wrote:
> NVIDIA T4 GPUs do not work with SBR. This problem is found when the T4
> card is direct attached to a Root Port only. So avoid bus reset by
> marking T4 GPUs PCI_DEV_FLAGS_NO_BUS_RESET.
> 
> Fixes: 4c207e7121fa ("PCI: Mark some NVIDIA GPUs to avoid bus reset")
> Signed-off-by: Wu Zongyong <wuzongyong@...ux.alibaba.com>
> ---
>  drivers/pci/quirks.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 44cab813bf95..be86b93b9e38 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -3618,7 +3618,7 @@ static void quirk_no_bus_reset(struct pci_dev *dev)
>   */
>  static void quirk_nvidia_no_bus_reset(struct pci_dev *dev)
>  {
> -	if ((dev->device & 0xffc0) == 0x2340)
> +	if ((dev->device & 0xffc0) == 0x2340 || dev->device == 0x1eb8)
>  		quirk_no_bus_reset(dev);
>  }
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
> -- 
> 2.34.3
Any further comments about this patch?