netdev - Re: [PATCH] myri10ge: improve port type reporting in ethtool output

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Message-ID: <4ADC69FF.5000109@myri.com>
Date:	Mon, 19 Oct 2009 09:30:39 -0400
From:	Andrew Gallatin <gallatin@...i.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	Brice Goglin <brice@...i.com>,
	"David S. Miller" <davem@...emloft.net>,
	Linux Network Development list <netdev@...r.kernel.org>
Subject: Re: [PATCH] myri10ge: improve port type reporting in ethtool output

Ben Hutchings wrote:
> On Mon, 2009-10-19 at 08:34 -0400, Andrew Gallatin wrote:
>> Ben Hutchings wrote:
>>
>>> Lying about link modes is not an improvement.
>> OK, so we're probably doing something wrong. I suspect we're not
>> alone.  At least we don't set SUPPORTED_TP for CX4, like I've
>> seen some NICs do.
>>
>> Can somebody suggest how we can tell ethtool that
>> the NIC supports 10Gb only (no autoneg down to 1Gb or lower)
>> for copper (10Gbase-CX4)?   How about for fiber (10Gbase-{S,L})R?
> 
> What's wrong with what you already do?  Customers expect to see
> something on the supported line?

Exactly.  One has complained because drivers for
other vendors NICs show this, even if they are fibre NICs
or CX4 NICs, and don't actually support 10GbaseT.

I'm happy to back this part out, and resubmit the patch without
it. There is still some fairly valuable stuff in the patch
-- mainly updating the NIC detection logic for new NICs to
detect fibre vs copper.

Drew
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