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References: <20230518072657.1.If9539da710217ed92e764cc0ba0f3d2d246a1aee@changeid>
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From:   Pavan Chebbi <pavan.chebbi@broadcom.com>
Date:   Thu, 18 May 2023 16:06:16 +0530
Message-ID: <CALs4sv2+Uu=Bry=B3FYzWdNrHjGWDvPCDhTFcNERVpWTjpmEyA@mail.gmail.com>
Subject: Re: [PATCH] igb: Fix igb_down hung on surprise removal
To:     Ying Hsu <yinghsu@chromium.org>
Cc:     netdev@vger.kernel.org, grundler@chromium.org,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Jesse Brandeburg <jesse.brandeburg@intel.com>,
        Paolo Abeni <pabeni@redhat.com>,
        Tony Nguyen <anthony.l.nguyen@intel.com>,
        intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org
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On Thu, May 18, 2023 at 12:58=E2=80=AFPM Ying Hsu <yinghsu@chromium.org> wr=
ote:
>
> diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethe=
rnet/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(stru=
ct pci_dev *pdev,
>         struct net_device *netdev =3D pci_get_drvdata(pdev);
>         struct igb_adapter *adapter =3D netdev_priv(netdev);
>
> +       if (state =3D=3D pci_channel_io_normal) {
> +               dev_warn(&pdev->dev, "Non-correctable non-fatal error rep=
orted.\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 =3D=3D pci_channel_io_perm_failure)
> --
> 2.40.1.606.ga4b1b128d6-goog
>
>

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