netdev - Re: r8169 not working on 5.2.0rc6 with GPD MicroPC

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Date:   Sun, 30 Jun 2019 19:42:01 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Karsten Wiborg <karsten.wiborg@....de>,
        Andrew Lunn <andrew@...n.ch>
Cc:     nic_swsd@...ltek.com, romieu@...zoreil.com, netdev@...r.kernel.org
Subject: Re: r8169 not working on 5.2.0rc6 with GPD MicroPC

On 30.06.2019 18:03, Karsten Wiborg wrote:
> Hi Andrew,
> 
> On 30/06/2019 16:55, Andrew Lunn wrote:
>> Hi Karsten
>>
>> What MAC address do you get with the vendor driver? Is it the same MAC
>> address every time you reboot, or does it look random.
>>
>> The BIOS is expected to program the MAC address into the hardware. It
>> could be that the vendor driver is checking if the MAC address is
>> valid, and if not, picking a random MAC address. The mainline driver
>> does not do this.
> 
> I programmed a static DHCP-entry on my local DHCP-server so I would
> notice if the MAC address changes. Just turned the computer back on and
> received the intended IP address, so the MAC address seems to stay the
> same with the vendor driver.
> 

Vendor driver uses this code, do you see the related messages in syslog?

        if (!is_valid_ether_addr(mac_addr)) {
                netif_err(tp, probe, dev, "Invalid ether addr %pM\n",
                          mac_addr);
                eth_hw_addr_random(dev);
                ether_addr_copy(mac_addr, dev->dev_addr);
                netif_info(tp, probe, dev, "Random ether addr %pM\n",
                           mac_addr);
                tp->random_mac = 1;
        }

> The vendor part of my MAC is 6e:69:73 which is interesting because
> according to some Vendor-Lookup-pages the vendor is unknown.
> 
> Regards,
> Karsten
>