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Date:   Thu, 23 May 2019 15:55:15 -0700
From:   Jeff Kirsher <>
To:     Feng Tang <>,
        Sasha Neftin <>,
        Aaron F Brown <>,,
Subject: Re: [RESEND PATCH] intel-ethernet: warn when fatal read failure

On Thu, 2019-05-23 at 11:22 +0800, Feng Tang wrote:
> Failed in reading the HW register is very serious for igb/igc driver,
> as its hw_addr will be set to NULL and cause the adapter be seen as
> We saw the error only a few times in the MTBF test for
> suspend/resume,
> but can hardly get any useful info to debug.
> Adding WARN() so that we can get the necessary information about
> where and how it happens, and use it for root causing and fixing
> this "PCIe link lost issue"
> This affects igb, igc.
> Signed-off-by: Feng Tang <>
> Tested-by: Aaron Brown <>
> Acked-by: Sasha Neftin <>
> ---
>  drivers/net/ethernet/intel/igb/igb_main.c | 1 +
>  drivers/net/ethernet/intel/igc/igc_main.c | 1 +
>  2 files changed, 2 insertions(+)

This patch is already in my next series of 1GbE patches to push to
Dave, so you can expect this to be pushed upstream before the weekend.

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