[PATCH 2/3] base-files: failsafe: Start also CPU interface for DSA

[Hauke Mehrtens]

On 6/20/21 10:32 AM, DENG Qingfang wrote:
> On Sat, Jun 19, 2021 at 08:36:10PM +0200, Hauke Mehrtens wrote:
>> On a DSA switch the ports have an upper device, the CPU device, e.g.
>> eth0. This device has to be in up state to bring up the lower devices
>> like lan1.
>>
>> Parse the link device from "ip link show" and bring it into up stated
>> before bringing up the actual interface.
>>
>> This is needed to make network in failsafe on systems with DSA work.
> 
> 
> Hi Hauke,
> 
> You may instead backport the upstream commit 9d5ef190e561
> ("net: dsa: automatically bring up DSA master when opening user port").

Thanks for the hint, I was not aware of this patch.

I tried this kernel patch and it works good without my script patch, I 
anyway do not like the parsing of the "ip link show" output.

I would prefer to just backport this kernel patch instead, it applies 
without problems.

Hauke