netdev - Re: [PATCH v2] net: Allow ethtool to set interface in loopback mode.

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Message-ID: <20110104175358.5e15b901@nehalam>
Date:	Tue, 4 Jan 2011 17:53:58 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Rick Jones <rick.jones2@...com>
Cc:	Ben Hutchings <bhutchings@...arflare.com>,
	Mahesh Bandewar <maheshb@...gle.com>,
	David Miller <davem@...emloft.net>,
	Laurent Chavey <chavey@...gle.com>,
	Tom Herbert <therbert@...gle.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v2] net: Allow ethtool to set interface in loopback
 mode.

On Tue, 04 Jan 2011 17:34:29 -0800
Rick Jones <rick.jones2@...com> wrote:

> >>>Since this is a boolean it SHOULD go into ethtool_flags rather than
> >>>being a high level operation.
> >>
> >>It could do, but I though ETHTOOL_{G,S}FLAGS were intended for
> >>controlling offload features.
> > 
> > 
> > It just seems the number of hooks keeps growing which takes more space
> > and increases complexity.
> 
> Is there any complication/downside to using flags in the (un?)likely event of 
> wanting different flavors of loopback in the card?
> 
> rick jones

Then let is keep it as command and have a parameter to set mode.
There might be drivers that want to loopback in SW, HW, PHY or even switch.

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