Re: [PATCH v2] net: usb: ax88179_178a: avoid writing the mac address before first reading

From: Yongqin Liu
Date: Wed May 08 2024 - 01:43:04 EST


Hi, Jose

On Wed, 1 May 2024 at 00:01, Jose Ignacio Tornos Martinez
<jtornosm@xxxxxxxxxx> wrote:
>
> > v6.8.8 has 56f78615b already. We need another patch, Jose?
>
> Hello Jakub,
>
> I will try to analyze it during the next week (I will be out until then).
>

Not sure if you have checked it already, this commit causes an issue for the
db845c + ACK android15-6.6[1] + AOSP main Android configuration, the
ethernet does not work,
there is no ip address assigned, like:
db845c:/ # ifconfig eth0
eth0 Link encap:Ethernet HWaddr 02:00:89:7a:fb:61 Driver ax88179_178a
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 TX bytes:0

db845c:/ #
if I have this change reverted, then it will work again:
db845c:/ # ifconfig eth0
eth0 Link encap:Ethernet HWaddr 02:00:89:7a:fb:61 Driver ax88179_178a
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: 240e:305:2c88:4700:4b6d:926d:1592:fc5e/64
Scope: Global
inet6 addr: 240e:305:2c88:4700:edc9:86ec:7c5e:b028/64
Scope: Global
inet6 addr: fe80::32ce:8a2e:269d:e53f/64 Scope: Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:966 errors:0 dropped:33 overruns:0 frame:0
TX packets:475 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:51193 TX bytes:39472

db845c:/ #

One thing to be noted here is that, during the boot, the MAC address
will be reassigned
to make sure each board has its own unique MAC address with the
following commands:
/vendor/bin/ifconfig eth0 down
/vendor/bin/ifconfig eth0 hw ether "${ETHADDR}"
/vendor/bin/ifconfig eth0 up


Could you please help have a check and fix or give some suggestions on
this issue?

[1]: https://android.googlesource.com/kernel/common/+/refs/heads/android15-6.6
--
Best Regards,
Yongqin Liu
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