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

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Date:	Mon, 10 Jun 2013 11:43:04 -0700
From:	John Fastabend <john.r.fastabend@...el.com>
To:	Narendra_K@...l.com
CC:	john.fastabend@...il.com, bhutchings@...arflare.com, bjorn@...k.no,
	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: [RFC PATCH] Initialize dev_id sysfs attribute to -1 by default

[...]

> Hi John, thank you for the inputs.  It was set to  -1 to differentiate between driver setting it to zero and the default value zero.
>

The point I was trying to make here is setting it to a single
digit 0, 1, or -1 doesn't really help in a virtualized environment
where you may not have access to the PCI topology, serial #s, etc.
You need a system-wide unique id.

Anyways looks like your on the right track.

.John

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