linux-kernel - Re: [PATCH v2] i2c: cadence: try reset when master receive arbitration lost

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Message-ID: <CAKfKVtEwHcydp=+hNhG91h3qbMoYOPq7jEYjbuAVrWXT53DC3Q@mail.gmail.com>
Date:   Tue, 5 Nov 2019 13:12:22 +0530
From:   Shubhrajyoti Datta <shubhrajyoti.datta@...il.com>
To:     Shikai Wang <sxauwsk@....com>
Cc:     Michal Simek <michal.simek@...inx.com>,
        Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] i2c: cadence: try reset when master receive
 arbitration lost

Hi Shikai,

On Tue, Feb 19, 2019 at 8:19 AM Shikai Wang <sxauwsk@....com> wrote:
>
> When the adapter receive arbitration lost error interrupts,
> cdns_i2c_master_xfer return to the caller directly instead of resetting
> the adapter which resulted in the adapter being out of control.
>
> So when driver detect err_status such as arbitration lost,
> then try to repair and fix it.
>
I am missing the issue that you are facing.
You are having a multimaster scenario and getting arbitration lost.

the current code would attempt a retry did that lead to any issues?

Can you explain the issue that you are facing?