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

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Date:	Mon, 27 Apr 2009 12:36:06 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Grant Likely <grant.likely@...retlab.ca>
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 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.

-Scott
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