On Thu, Sep 02, 2021 at 01:36:19PM +0800, DENG Qingfang wrote:

On Fri, Aug 27, 2021 at 12:19:23PM +0200, Greg KH wrote:

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On Tue, Aug 24, 2021 at 11:57:53PM +0800, DENG Qingfang wrote:

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Standalone ports should have address learning disabled, according to
the documentation:
https://www.kernel.org/doc/html/v5.14-rc7/networking/dsa/dsa.html#bridge-layer
dsa_switch_ops on 5.10 or earlier does not have .port_bridge_flags
function so it has to be done differently.

I've identified an issue related to this.

What issue is that?  Where was it reported?

See Florian's message here
https://lore.kernel.org/stable/20210317003549.3964522-2-f.fainelli@gmail.com/ (local)

THat is just the patch changelog text, or is it unique to this
stable-only patch?  It is not obvious at all.

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2. A partial backport of this patch?

The other part does not actually fix anything.

Then why is it not ok to just take the whole thing?

When backporting not-identical-patches, something almost always goes
wrong, so we prefer to take the original commit when ever possible.

Okay. MDB and tag ops can be backported as is, and broadcast/multicast
flooding can be implemented in .port_egress_floods. 

So what are we supposed to do here?

totally confused,

greg k-h

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