linux-kernel - Re: [PATCH v2 5/8] net: pxa168_eth: get and set the mac address on the Ethernet controller

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Date:	Tue, 9 Sep 2014 18:36:22 +0200
From:	Antoine Tenart <antoine.tenart@...e-electrons.com>
To:	Jason Cooper <jason@...edaemon.net>
Cc:	Antoine Tenart <antoine.tenart@...e-electrons.com>,
	sebastian.hesselbarth@...il.com,
	alexandre.belloni@...e-electrons.com,
	thomas.petazzoni@...e-electrons.com, zmxu@...vell.com,
	jszhang@...vell.com, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/8] net: pxa168_eth: get and set the mac address on
 the Ethernet controller

Jason,

On Tue, Sep 09, 2014 at 12:29:58PM -0400, Jason Cooper wrote:
> On Tue, Sep 09, 2014 at 04:44:05PM +0200, Antoine Tenart wrote:
> > When changing the MAC address, in addition to updating the dev_addr in
> > the net_device structure, this patch also update the MAC address
> > registers (high and low) of the Ethernet controller with the new MAC.
> > The address stored in these registers is used for IEEE 802.3x Ethernet
> > flow control, which is already enabled.
> > 
> > This patch also tries reading the MAC address stored in these registers
> > when probing the driver, to use the MAC address set by the bootloader
> > and avoid using a random one.
> 
> Hmm, the wording here seems odd.  I think the preference should be:
> 
>  1) bootloader-supplied addr via DT
>  2) addr read from device
>  3) randomly generated one.

I agree. I'll update that.

Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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