linux-kernel - Re: [PATCH] Staging: comedi: addi-data: clean-up variable use in hwdrv

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Message-ID: <530C68B7.4000500@mev.co.uk>
Date:	Tue, 25 Feb 2014 09:56:07 +0000
From:	Ian Abbott <abbotti@....co.uk>
To:	Chase Southwood <chase.southwood@...oo.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:	Ian Abbott <ian.abbott@....co.uk>,
	"hsweeten@...ionengravers.com" <hsweeten@...ionengravers.com>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Staging: comedi: addi-data: clean-up variable use in
 hwdrv_apci035.c

On 2014-02-25 08:15, Chase Southwood wrote:
> The static variable ui_Command is as of right now being cleared to a
> value of zero between everytime that it writes to a port and then takes a
> new value from a port.  Seems like this zeroing is unnecessary, so we can
> just remove these lines.

The description is slightly wrong as the variable isn't static storage 
class.

>
> Signed-off-by: Chase Southwood <chase.southwood@...oo.com>
> ---
> This sort of thing seems like a copy/paste sort of error to me, but there
> could as easily be some reason here that I'm missing that this is needed
> here.  My first impression, however, was that this extra clearing is
> useless.

Yes, the extra clearing was useless.  There are also some useless 
initializers for this variable and others.

Fine, apart from the description.

Reviewed-by: Ian Abbott <abbotti@....co.uk>

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk>        )=-
-=( Tel: +44 (0)161 477 1898   FAX: +44 (0)161 718 3587         )=-
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