linux-kernel - Re: [PATCH v3 0/4] P2040/P2041 i2c recovery erratum

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Message-ID: <YK1GuD8o7k+jDLFZ@kunai>
Date:   Tue, 25 May 2021 20:49:28 +0200
From:   "wsa@...nel.org" <wsa@...nel.org>
To:     Chris Packham <Chris.Packham@...iedtelesis.co.nz>
Cc:     Joakim Tjernlund <Joakim.Tjernlund@...inera.com>,
        "andy.shevchenko@...il.com" <andy.shevchenko@...il.com>,
        "andriy.shevchenko@...ux.intel.com" 
        <andriy.shevchenko@...ux.intel.com>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 0/4] P2040/P2041 i2c recovery erratum


> For those reading along the v2 mentioned in that thread was posted as 
> https://lore.kernel.org/linux-i2c/20170511122033.22471-1-joakim.tjernlund@infinera.com/ 
> there was a bit of discussion but it seemed to die out without reaching 
> a conclusion.
> 
> The i2c-mpc driver is now using the generic recovery mechanism so that 
> addresses one bit of feedback from the original thread.

Yes, and the generic recovery has been improved since then. There is an
"incomplete_write_byte" fault injector now and the generic recovery
handles it correctly meanwhile. Before, it actually could cause a write
to happen but we are sending STOPs now.


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