linux-kernel - Re: [PATCH 3/6] i2c: Ignore return value of i2c_del

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Date:	Sun, 31 Mar 2013 10:25:47 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Wolfram Sang <wsa@...-dreams.de>, Ben Dooks <ben-linux@...ff.org>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	Guan Xuetao <gxt@...c.pku.edu.cn>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alan Cox <alan@...ux.intel.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Shawn Guo <shawn.guo@...aro.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Lars Poeschel <poeschel@...onage.de>
Subject: Re: [PATCH 3/6] i2c: Ignore return value of i2c_del_adapter()

On Sat,  9 Mar 2013 19:16:46 +0100, Lars-Peter Clausen wrote:
> i2c_del_adapter() always returns 0. So all checks testing whether it will be
> non zero will always evaluate to false and the conditional code is dead code.
> This patch updates all callers of i2c_del_mux_adapter() to ignore the return
> value and assume that it will always succeed (which it will). In a subsequent
> patch the return type of i2c_del_adapter() will be made void.
> 
> Cc: Jean Delvare <khali@...ux-fr.org>
> Cc: Guan Xuetao <gxt@...c.pku.edu.cn>
> Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
> Cc: Ben Hutchings <bhutchings@...arflare.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Alan Cox <alan@...ux.intel.com>
> Cc: Nicolas Ferre <nicolas.ferre@...el.com>
> Cc: Aaro Koskinen <aaro.koskinen@....fi>
> Cc: Marek Vasut <marex@...x.de> (commit_signer:11/20=55%)
> Cc: Shawn Guo <shawn.guo@...aro.org>
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Cc: Lars Poeschel <poeschel@...onage.de>
> Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
> ---
>  drivers/gpu/drm/gma500/oaktrail_hdmi_i2c.c   |  3 +--
>  drivers/i2c/busses/i2c-amd756-s4882.c        |  6 +-----
>  drivers/i2c/busses/i2c-at91.c                |  5 ++---
>  drivers/i2c/busses/i2c-cbus-gpio.c           |  4 +++-
>  drivers/i2c/busses/i2c-intel-mid.c           |  3 +--
>  drivers/i2c/busses/i2c-mv64xxx.c             |  5 ++---
>  drivers/i2c/busses/i2c-mxs.c                 |  5 +----
>  drivers/i2c/busses/i2c-nforce2-s4985.c       |  6 +-----
>  drivers/i2c/busses/i2c-powermac.c            | 10 ++--------
>  drivers/i2c/busses/i2c-puv3.c                | 10 ++--------
>  drivers/i2c/busses/i2c-viperboard.c          |  5 ++---
>  drivers/i2c/i2c-mux.c                        |  5 +----
>  drivers/media/pci/bt8xx/bttv-input.c         |  6 +++---
>  drivers/media/pci/mantis/mantis_i2c.c        |  4 +++-
>  drivers/net/ethernet/sfc/falcon.c            |  6 ++----
>  drivers/staging/media/go7007/go7007-driver.c |  7 ++-----
>  16 files changed, 29 insertions(+), 61 deletions(-)
> (...)

For i2c-amd756-s4882, i2c-nforce2-s4985 and i2c-mux:

Reviewed-by: Jean Delvare <khali@...ux-fr.org>

-- 
Jean Delvare
--
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