netdev - Re: [RFC PATCH] Initialize dev_id sysfs attribute to -1 by default

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Message-ID: <20130531121737.GB1311@fedora-17-guest.blr.amer.dell.com>
Date:	Fri, 31 May 2013 05:17:49 -0700
From:	<Narendra_K@...l.com>
To:	<bjorn@...k.no>
CC:	<netdev@...r.kernel.org>, <bhutchings@...arflare.com>
Subject: Re: [RFC PATCH] Initialize dev_id sysfs attribute to -1 by default

On Thu, May 30, 2013 at 07:08:46PM +0530, Bjørn Mork wrote:
> 
> <Narendra_K@...l.com> writes:
> 
> > From: Narendra K <narendra_k@...l.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

Ok, thank you for pointing it. I missed it while looking for its
possible use scenarios.

With regards,
Narendra K
Linux Engineering
Dell Inc.
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