linux-kernel - Re: [PATCH] net: mv643xx_eth: Add missing phy_addr

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Message-ID: <87sivacxcf.fsf@natisbad.org>
Date:	Tue, 05 Nov 2013 23:12:00 +0100
From:	arno@...isbad.org (Arnaud Ebalard)
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Jason Cooper <jason@...edaemon.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linuxppc-dev@...ts.ozlabs.org, David Miller <davem@...emloft.net>,
	Lennert Buytenhek <buytenh@...tstofly.org>
Subject: Re: [PATCH] net: mv643xx_eth: Add missing phy_addr_set in DT mode

Hi Jason,

Jason Gunthorpe <jgunthorpe@...idianresearch.com> writes:

> Commit cc9d4598 'net: mv643xx_eth: use of_phy_connect if phy_node
> present' made the call to phy_scan optional, if the DT has a link to
> the phy node.
>
> However phy_scan has the side effect of calling phy_addr_set, which
> writes the phy MDIO address to the ethernet controller. If phy_addr_set
> is not called, and the bootloader has not set the correct address then
> the driver will fail to function.

Thanks *a lot* for fixing this one! I had the issue on my ReadyNAS 102
(Armada 370 based) which I had put on a todo list and temporarily
workarounded by including a 'ping whatever' call in my u-boot env in
order to force it to do the init. Without it, I was unable to properly
use the interface. With your fix, after multiple reboots to test it,
everything works as expected. So, FWIW: 

Tested-by: Arnaud Ebalard <arno@...isbad.org>

Cheers,

a+
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