From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?utf-8?Q?Bj=C3=B8rn_Mork?= <bjorn@mork.no>
Subject: Re: [RFC PATCH] Initialize dev_id sysfs attribute to -1 by default
Date: Thu, 30 May 2013 15:38:46 +0200
Message-ID: <87fvx4mvtl.fsf@nemi.mork.no>
References: <20130530132419.GA1368@fedora-17-guest.blr.amer.dell.com>
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Cc: <netdev@vger.kernel.org>, <bhutchings@solarflare.com>
To: <Narendra_K@Dell.com>
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	(Narendra K.'s message of "Thu, 30 May 2013 18:55:47 +0530")
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<Narendra_K@Dell.com> writes:

> From: Narendra K <narendra_k@dell.com>
>
> 'dev_id' sysfs attribute is initialized to zero by default.
> It is also zero based. This creates ambiguity in differentiating
> whether the driver set it to zero or it is the default value.
> Initialize 'dev_id' to -1 to make the scenario unambiguous.

I understand your concern, but I don't think you can do this.  It
changes the userspace API, and has some very visible side effects.

Please take a look at net/ipv6/addrconf.c


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