linux-kernel - Re: Purpose of parameter in sysfs binary read

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Message-ID: <20090818160215.GB7039@kroah.com>
Date:	Tue, 18 Aug 2009 09:02:15 -0700
From:	Greg KH <greg@...ah.com>
To:	"Rick L. Vinyard, Jr." <rvinyard@...nmsu.edu>
Cc:	Linux USB <linux-usb@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Purpose of parameter in sysfs binary read

On Tue, Aug 18, 2009 at 09:41:56AM -0600, Rick L. Vinyard, Jr. wrote:
> Greg KH wrote:
> > On Tue, Aug 18, 2009 at 08:55:29AM -0600, Rick L. Vinyard, Jr. wrote:
> > What are you using the binary sysfs attribute for?  It should ONLY be
> > used as a pass-through to and from hardware, with no interpretation by
> > the kernel at all.
> 
> It's for the Logitech G13's game panel image (a simple binary bitmap of
> the pixels).
> 
> It doesn't do any interpretation... just a few checks on the magic number
> and size.

Cool.  Have a pointer to the driver yet?

thanks,

greg k-h
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