netdev - Re: [PATCH] net/core: use net_device dev

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Date:	Wed, 26 May 2010 18:27:30 +0300
From:	Eli Cohen <eli@....mellanox.co.il>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	Eli Cohen <eli@...lanox.co.il>, davem@...emloft.net,
	netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
	rdreier@...co.com, yevgenyp@...lanox.co.il
Subject: Re: [PATCH] net/core: use net_device dev_id to indicate port number

On Wed, May 26, 2010 at 08:23:06AM -0700, Stephen Hemminger wrote:
> On Wed, 26 May 2010 12:52:00 +0300
> Eli Cohen <eli@...lanox.co.il> wrote:
> 
> > Today, there are no means to know which port of a hardware device a netdev
> > interface uses. struct net_device conatins a field, dev_id, that can be used
> > for that. This patch adds a new macro, SET_NETDEV_DEV_ID(), to provide a
> > standard way to set the value of this field.
> > Also also make use of this feature in the mlx4_en driver to set the port
> > number; port numbers are zero based.
> 
> Why is a macro wrapper needed?
> 

I guess for the same reason we use SET_NETDEV_DEV - to provide a
consistent interface for setting this value...
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