netdev - Re: Regression v5.12-rc3: net: stmmac: re-init rx buffers when mac resume back

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Date:   Tue, 13 Apr 2021 09:43:05 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Joakim Zhang <qiangqing.zhang@....com>,
        Jon Hunter <jonathanh@...dia.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>
Subject: Re: Regression v5.12-rc3: net: stmmac: re-init rx buffers when mac
 resume back

On Tue, 13 Apr 2021 18:06:39 +0200 Thierry Reding wrote:
> given where we are in the release cycle, I think it'd be best to revert
> commit 9c63faaa931e ("net: stmmac: re-init rx buffers when mac resume
> back") for now.
> 
> To summarize the discussion: the patch was meant as a workaround to fix
> an occasional suspend/resume failure on one board that was not fully
> root caused, and ends up causing fully reproducible suspend/resume
> failures on at least one other board.
> 
> Joakim is looking at an alternative solution and Jon and I can provide
> testing from the Tegra side for any fixes.
> 
> Do you want me to send a revert patch or can you revert directly on top
> of your tree?

Please send a revert with the justification in the commit log, and 
perhaps also:

Link: https://lore.kernel.org/r/708edb92-a5df-ecc4-3126-5ab36707e275@nvidia.com/

for those who want to dig deeper in the history. Make sure you 
CC relevant folks so they can review and express their opinions.

Thanks!