linux-kernel - Re: [PATCH] NFC: Driver for Inside Secure MicroRead NFC chip

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Date:	Fri, 1 Apr 2011 21:43:23 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Aloisio Almeida <aloisio.almeida@...nbossa.org>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Waldemar.Rymarkiewicz@...to.com, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, hthebaud@...idefr.com,
	matti.j.aaltonen@...ia.com, alan@...rguk.ukuu.org.uk,
	Sebastian.Chlad@...to.com
Subject: Re: [PATCH] NFC: Driver for Inside Secure MicroRead NFC chip

On Friday 01 April 2011 20:19:30 Aloisio Almeida wrote:
> We are finalizing a NFC stack prototype and we decided to use generic
> netlink. But during the implementation we found a disadvantage of this
> approach.
> 
> While implementing data_exchange through netlink, it was not possible
> to avoid memcpy as the skbuff coming from netlink can contain more
> than one message.

I don't think anyone in this thread suggested using netlink for user
data.

> We didn't find any implementation that uses netlink to exchage data.
> As in the nl80211, the netlink is used only for control commands.

Yes, that is the normal way to do it.
 
> We plan to publish for comments this prototype early next week. Then
> we plan to implement a version using AF_NFC.

Sounds good.
	
	Arnd
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