On Tue, Aug 11, 2015 at 06:01:32PM +0100, Stephen Hemminger wrote:
> On Tue, 11 Aug 2015 15:35:56 +0100
> Liviu Dudau <[email protected]> wrote:
>
> > On some embedded systems the EEPROM does not contain a valid MAC address.
> > In that case it is better to fallback to a generated mac address and
> > let init scripts fix the value later.
> >
> > Reported-by: Liviu Dudau <[email protected]>
> > Signed-off-by: Stephen Hemminger <[email protected]>
> > [Changed handcoded setup to use eth_hw_addr_random() instead]
> > Signed-off-by: Liviu Dudau <[email protected]>
> > ---
> > I have tested this on my Juno platform and I can successfully do an nfsroot
> > boot.
> >
> > Best regards,
> > Liviu
> >
> > drivers/net/ethernet/marvell/sky2.c | 7 +++++++
> > 1 file changed, 7 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/marvell/sky2.c
> > b/drivers/net/ethernet/marvell/sky2.c
> > index d9f4498..c309879 100644
> > --- a/drivers/net/ethernet/marvell/sky2.c
> > +++ b/drivers/net/ethernet/marvell/sky2.c
> > @@ -4819,6 +4819,13 @@ static struct net_device *sky2_init_netdev(struct
> > sky2_hw *hw, unsigned port,
> > memcpy_fromio(dev->dev_addr, hw->regs + B2_MAC_1 + port * 8,
> > ETH_ALEN);
> >
> > + /* if the address is invalid, use a random value */
> > + if (!is_valid_ether_addr(dev->dev_addr)) {
> > + netdev_warn(dev,
> > + "Invalid MAC address, defaulting to random\n");
> > + eth_hw_addr_random(dev);
> > + }
> > +
> > return dev;
> > }
> >
>
> This is not enough, you need to program the hardware with the new random MAC
> address. The easiest way is calling sky2_set_mac_address, but you need to
> convert
> the address from array back to sockaddr.
>
OK, I am a bit confused as to why sky2_set_mac_address is needed here, as this
was not
required by the existing function. Given that in my tests I get a random MAC
address
assigned every time to the device and I can see the same MAC address with
ifconfig, how
can I test the effect of sky2_set_mac_address if I add it?
Best regards,
Liviu
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
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