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

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Date:	Mon, 27 Apr 2009 11:50:20 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Scott Wood <scottwood@...escale.com>
Cc:	Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>,
	Andy Fleming <afleming@...escale.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	David Miller <davem@...emloft.net>, linuxppc-dev@...abs.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] net: Fix ucc_geth.c handling of phy 'interface' property.

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.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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