linux-kernel - Re: [PATCH v3 8/9] i2c: tegra: Always terminate DMA transfer

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Message-ID: <da4ee98be8314ca296de364b79958b23@HQMAIL105.nvidia.com>
Date:   Tue, 7 Jan 2020 12:39:18 +0000
From:   Thierry Reding <treding@...dia.com>
To:     Dmitry Osipenko <digetx@...il.com>
CC:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        "Mikko Perttunen" <cyndis@...si.fi>,
        Wolfram Sang <wsa@...-dreams.de>, <linux-i2c@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 8/9] i2c: tegra: Always terminate DMA transfer

On Mon, 06 Jan 2020 04:04:22 +0300, Dmitry Osipenko wrote:
> It is possible that I2C could error out in the middle of DMA transfer and
> in this case DMA channel needs to be reset, otherwise a follow up transfer
> will fail because DMA channel stays blocked.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/i2c/busses/i2c-tegra.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)

Tested-by: Thierry Reding <treding@...dia.com>