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

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Date:   Wed, 24 May 2023 12:31:57 +0000
From:   "Loktionov, Aleksandr" <aleksandr.loktionov@...el.com>
To:     "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        Grant Grundler <grundler@...omium.org>,
        Pavan Chebbi <pavan.chebbi@...adcom.com>,
        "Neftin, Sasha" <sasha.neftin@...el.com>,
        "Ruinskiy, Dima" <dima.ruinskiy@...el.com>
CC:     Ying Hsu <yinghsu@...omium.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        "Eric Dumazet" <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        Paolo Abeni <pabeni@...hat.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] igb: Fix igb_down hung on surprise removal

Good day Tony

We reviewed the patch and have nothing against.

With the best regards
Alex
ND ITP Linux 40G base driver TL 



> -----Original Message-----
> From: Nguyen, Anthony L <anthony.l.nguyen@...el.com>
> Sent: Tuesday, May 23, 2023 8:04 PM
> To: Grant Grundler <grundler@...omium.org>; Pavan Chebbi
> <pavan.chebbi@...adcom.com>; Loktionov, Aleksandr
> <aleksandr.loktionov@...el.com>; Neftin, Sasha <sasha.neftin@...el.com>;
> Ruinskiy, Dima <dima.ruinskiy@...el.com>
> Cc: Ying Hsu <yinghsu@...omium.org>; netdev@...r.kernel.org; David S.
> Miller <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>;
> Jakub Kicinski <kuba@...nel.org>; Brandeburg, Jesse
> <jesse.brandeburg@...el.com>; Paolo Abeni <pabeni@...hat.com>; intel-
> wired-lan@...ts.osuosl.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] igb: Fix igb_down hung on surprise removal
> 
> On 5/22/2023 1:16 PM, Grant Grundler wrote:
> > On Thu, May 18, 2023 at 3:36 AM Pavan Chebbi
> <pavan.chebbi@...adcom.com> wrote:
> >>
> >> 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.
> >
> > I have the same opinion. This appears to solve the problem - but I
> > don't know if there is a better way to solve this problem.
> >
> >> Intel guys may comment.
> >
> > Ping? Can we please get feedback from IGB/IGC maintainers this week?
> >
> > (I hope igc maintainers can confirm this isn't an issue for igc.)
> 
> Adding some of the igb and igc developers.
> 
> > cheers,
> > grant
> >
> >>
> >>>          netif_device_detach(netdev);
> >>>
> >>>          if (state == pci_channel_io_perm_failure)
> >>> --
> >>> 2.40.1.606.ga4b1b128d6-goog
> >>>
> >>>