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

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Date:   Sun, 30 Jun 2019 23:55:31 +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 23:29, Karsten Wiborg wrote:
> Hi Heiner,
> 
> On 30/06/2019 19:42, Heiner Kallweit wrote:
>> 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;
>>         }
>>
> 
> did the following:
> 
> # cat /var/log/messages |grep -i Invalid
> Jun 30 08:54:00 praktifix kernel: [    0.229213] DMAR-IR: Queued
> invalidation will be enabled to support x2apic and Intr-remapping.
> Jun 30 08:54:00 praktifix kernel: [   23.864072] Invalid pltconfig,
> ensure IPC1 device is enabled in BIOS
> Jun 30 10:17:30 praktifix kernel: [    0.228662] DMAR-IR: Queued
> invalidation will be enabled to support x2apic and Intr-remapping.
> Jun 30 10:17:30 praktifix kernel: [   24.198033] Invalid pltconfig,
> ensure IPC1 device is enabled in BIOS
> 
> But that does not relate to your error.
> 
> # cat /var/log/messages |grep -i random
> Jun 30 08:54:00 praktifix kernel: [    0.228092] random: crng done
> (trusting CPU's manufacturer)
> Jun 30 10:17:30 praktifix kernel: [    0.227534] random: crng done
> (trusting CPU's manufacturer)
> Jun 30 10:25:53 praktifix kernel: [  527.540354] r8168 0000:02:00.0
> (unnamed net_device) (uninitialized): Random ether addr 82:c2:81:10:6b:c2
> 
This one shows that the vendor driver (r8168) uses a random MAC address.
Means the driver can't read a valid MAC address from the chip, maybe due
to a broken BIOS.
Alternatively you could use r8169 and set a MAC address manually with
ifconfig <if> hw ether <MAC address>

> The last one probably results from my testing with r8169. The compiled
> r8168 went online later. That also is the only message I found.
> 
> Thank you for your help in debugging.
> 
> Regards and greetings from Hamburg,
> Karsten
> 
Heiner