netdev - Re: [PATCH] net: Fix ucc_geth.c handling of phy 'interface' property.

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Message-Id: <20090428.021203.74435054.davem@davemloft.net>
Date:	Tue, 28 Apr 2009 02:12:03 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	grant.likely@...retlab.ca
Cc:	scottwood@...escale.com, Joakim.Tjernlund@...nsmode.se,
	afleming@...escale.com, benh@...nel.crashing.org,
	linuxppc-dev@...abs.org, netdev@...r.kernel.org
Subject: Re: [PATCH] net: Fix ucc_geth.c handling of phy 'interface'
 property.

From: Grant Likely <grant.likely@...retlab.ca>
Date: Mon, 27 Apr 2009 11:50:20 -0600

> On Mon, Apr 27, 2009 at 11:36 AM, Scott Wood <scottwood@...escale.com> wrote:
>> On Mon, Apr 27, 2009 at 09:36:13AM -0600, Grant Likely wrote:
>>> From: Grant Likely <grant.likely@...retlab.ca>
>>>
>>> Previous rework to ucc_geth.c to add of_mdio support (net: Rework
>>> ucc_geth driver to use of_mdio infrastructure) added a block of
>>> code which broke older openfirmware device trees which use an
>>> 'interface' property in the phy node to describe the connection
>>> between the MAC and the PHY.  This patch removes the offending blurb.
>> [snip]
>>>       prop = of_get_property(np, "phy-connection-type", NULL);
>>>       if (!prop) {
>>>               /* handle interface property present in old trees */
>>> -             if (!phy)
>>> -                     return -ENODEV;
>>> -
>>>               prop = of_get_property(phy, "interface", NULL);
>>>               if (prop != NULL) {
>>>                       phy_interface = enet_to_phy_interface[*prop];
>>
>> The above test only makes a difference when there is no phy node -- so I
>> don't see how it was breaking device trees that had a phy node (with or
>> without an "interface" property).  I can see it breaking fixed link
>> device trees, though.
> 
> Sorry, you're right.  I got myself confused when I was writing the
> description.  This patch fixes breakage when using a fixed-link and
> there is no phy-connection-type property.

Patch applied with commit message fixed up.
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