linux-kernel - Re: [PATCH] igb: Fix igb_down hung on surprise removal

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Message-ID: <CALs4sv2+Uu=Bry=B3FYzWdNrHjGWDvPCDhTFcNERVpWTjpmEyA@mail.gmail.com>
Date:   Thu, 18 May 2023 16:06:16 +0530
From:   Pavan Chebbi <pavan.chebbi@...adcom.com>
To:     Ying Hsu <yinghsu@...omium.org>
Cc:     netdev@...r.kernel.org, grundler@...omium.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        intel-wired-lan@...ts.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] igb: Fix igb_down hung on surprise removal

On Thu, May 18, 2023 at 12:58 PM Ying Hsu <yinghsu@...omium.org> wrote:
>
> diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
> index 58872a4c2540..a8b217368ca1 100644
> --- a/drivers/net/ethernet/intel/igb/igb_main.c
> +++ b/drivers/net/ethernet/intel/igb/igb_main.c
> @@ -9581,6 +9581,11 @@ static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev,
>         struct net_device *netdev = pci_get_drvdata(pdev);
>         struct igb_adapter *adapter = netdev_priv(netdev);
>
> +       if (state == pci_channel_io_normal) {
> +               dev_warn(&pdev->dev, "Non-correctable non-fatal error reported.\n");
> +               return PCI_ERS_RESULT_CAN_RECOVER;
> +       }
> +

This code may be good to have. But not sure if this should be the fix
for igb_down() synchronization.
Intel guys may comment.

>         netif_device_detach(netdev);
>
>         if (state == pci_channel_io_perm_failure)
> --
> 2.40.1.606.ga4b1b128d6-goog
>
>

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