linux-kernel - Re: [PATCH v7 17/34] i2c: tegra: Remove outdated barrier()

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Date:   Mon, 21 Sep 2020 10:19:37 +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>,
        Wolfram Sang <wsa@...-dreams.de>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        <linux-i2c@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 17/34] i2c: tegra: Remove outdated barrier()

On Wed, 09 Sep 2020 01:39:49 +0300, Dmitry Osipenko wrote:
> The barrier() was intended to reduce possibility of racing with the
> interrupt handler, but driver's code evolved significantly and today's
> driver enables interrupt only when it waits for completion notification.
> Hence barrier() has no good use anymore, let's remove it.
> 
> Reviewed-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> Acked-by: Thierry Reding <treding@...dia.com>
> ---
>  drivers/i2c/busses/i2c-tegra.c | 13 +++++--------
>  1 file changed, 5 insertions(+), 8 deletions(-)

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