From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Korsgaard <jacmet@sunsite.dk>
Subject: Re: [PATCH] i2c: Remove unneeded xxx_set_drvdata(..., NULL) calls
Date: Sun, 17 Feb 2013 16:12:31 +0100
Message-ID: <87txpboty7.fsf@dell.be.48ers.dk>
References: <1360953682-25066-1-git-send-email-dianders@chromium.org>
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In-Reply-To: <1360970315-32116-1-git-send-email-dianders@chromium.org> (Doug
 Anderson's message of "Fri, 15 Feb 2013 15:18:35 -0800")
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To: Doug Anderson <dianders@chromium.org>
Cc: Wolfram Sang <wsa@the-dreams.de>, Tony Lindgren <tony@atomide.com>, Linus Walleij <linus.walleij@linaro.org>, Thierry Reding <thierry.reding@avionic-design.de>, Sekhar Nori <nsekhar@ti.com>, linux-i2c@vger.kernel.org, Guan Xuetao <gxt@mprc.pku.edu.cn>, Kevin Hilman <khilman@ti.com>, Sonic Zhang <sonic.zhang@analog.com>, linux-arm-kernel@lists.infradead.org, Deepak Sikri <deepak.sikri@st.com>, Havard Skinnemoen <hskinnemoen@gmail.com>, Marek Vasut <marex@denx.de>, Pawel Moll <pawel.moll@arm.com>, Stephen Warren <swarren@wwwdotorg.org>, Sascha Hauer <s.hauer@pengutronix.de>, Uwe =?utf-8?Q?Kleine?= =?utf-8?Q?-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>, Rob Herring <rob.herring@calxeda.com>, uclinux-dist-devel@blackfin.uclinux.org, Jean Delvare <khali@linux-fr.org>, Lars-Peter Clausen <lars@metafoo.de>, "Ben Dooks (embedded platforms)" <ben-linux@fluff.org>, Barry
List-Id: linux-omap@vger.kernel.org

>>>>> "Doug" == Doug Anderson <dianders@chromium.org> writes:

 Doug> There is simply no reason to be manually setting the private driver
 Doug> data to NULL in the remove/fail to probe cases.  This is just extra
 Doug> cruft code that can be removed.

 Doug> A few notes:
 Doug> * Nothing relies on drvdata being set to NULL.
 Doug> * The __device_release_driver() function eventually calls
 Doug>   dev_set_drvdata(dev, NULL) anyway, so there's no need to do it
 Doug>   twice.
 Doug> * I verified that there were no cases where xxx_get_drvdata() was
 Doug>   being called in these drivers and checking for / relying on the NULL
 Doug>   return value.

 Doug> This could be cleaned up kernel-wide but for now just take the baby
 Doug> step and remove from the i2c subsystem.

 Doug> Reported-by: Wolfram Sang <wsa@the-dreams.de>
 Doug> Reported-by: Stephen Warren <swarren@wwwdotorg.org>
 Doug> Signed-off-by: Doug Anderson <dianders@chromium.org>

For i2c-ocores.c + i2c-mux-gpio.c:

Acked-by: Peter Korsgaard <jacmet@sunsite.dk>

-- 
Bye, Peter Korsgaard