linux-kernel - Re: [PATCH] lis3: Add axes module parameter for custom axis-mapping

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Date:	Tue, 07 Sep 2010 17:54:58 +0200
From:	Éric Piel <eric.piel@...mplin-utc.net>
To:	Takashi Iwai <tiwai@...e.de>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Jean Delvare <khali@...ux-fr.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lis3: Add axes module parameter for custom axis-mapping

Op 07-09-10 16:44, Takashi Iwai schreef:
:
>> Wouldn't it be much cleaner if lis3_dev.ac was an array instead of a
>> struct? I don't mind that it involves changing more line if it makes
>> things more understandable.
> 
> OK, then it makes things easier.  The revised patch is below.
Yes, I like it much better...

>  
> +module_param_array_named(axes, lis3_dev.axis_map, int, NULL, 0644);
> +MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
But now there is no check at all about the value being between 1 and 3,
is there?

I think it's still necessary to have a small function which checks for
correct values, otherwise the user could read a bit anywhere in the memory.

Eric
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