linux-kernel - Re: [PATCH v2] i2c: Use u8 type in i2c transfer calls

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Message-ID: <Y1BuLyxEKLIAgF+5@shikoro>
Date:   Wed, 19 Oct 2022 23:37:51 +0200
From:   Wolfram Sang <wsa-dev@...g-engineering.com>
To:     Jason Gerecke <killertofu@...il.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Ping Cheng <pinglinux@...il.com>,
        "Tobita, Tatsunosuke" <tatsunosuke.tobita@...om.com>,
        Jason Gerecke <jason.gerecke@...om.com>,
        Ping Cheng <ping.cheng@...om.com>
Subject: Re: [PATCH v2] i2c: Use u8 type in i2c transfer calls


> I spent a little time trying to put together a Coccinelle script to
> take care of everything but I eventually realized the size of the task
> was larger than I was comfortable with. In particular, even though I
> might be able to put together a script, I worry I don't have a good
> way to test the resulting treewide changes to avoid regression.

The coccinelle scripts are one thing. I am quite familiar with it, so I
regard this as "work but doable". My main headache is that I am not sure
about the best way to upstream the result. I'd like to avoid a flag-day
where all drivers across all subsystems need to be converted, but I
don't really see a way around it. Preparing such a branch and make sure
it does not regress is quite some work on a moving target.


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