netdev - Re: [PATCH v2 net-next 4/4] Revert "net: dsa: Add more convenient functions for installing port VLANs"

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Date:   Fri, 11 Sep 2020 10:31:24 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     jakub.kicinski@...ronome.com, davem@...emloft.net, andrew@...n.ch,
        vivien.didelot@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next 4/4] Revert "net: dsa: Add more convenient
 functions for installing port VLANs"



On 9/11/2020 10:30 AM, Vladimir Oltean wrote:
> On Thu, Sep 10, 2020 at 12:52:03PM -0700, Florian Fainelli wrote:
>> On 9/10/2020 9:48 AM, Vladimir Oltean wrote:
>>> From: Vladimir Oltean <vladimir.oltean@....com>
>>>
>>> This reverts commit 314f76d7a68bab0516aa52877944e6aacfa0fc3f.
>>>
>>> Citing that commit message, the call graph was:
>>>
>>>       dsa_slave_vlan_rx_add_vid   dsa_port_setup_8021q_tagging
>>>                   |                        |
>>>                   |                        |
>>>                   |          +-------------+
>>>                   |          |
>>>                   v          v
>>>                  dsa_port_vid_add      dsa_slave_port_obj_add
>>>                         |                         |
>>>                         +-------+         +-------+
>>>                                 |         |
>>>                                 v         v
>>>                              dsa_port_vlan_add
>>>
>>> Now that tag_8021q has its own ops structure, it no longer relies on
>>> dsa_port_vid_add, and therefore on the dsa_switch_ops to install its
>>> VLANs.
>>>
>>> So dsa_port_vid_add now only has one single caller. So we can simplify
>>> the call graph to what it was before, aka:
>>>
>>>           dsa_slave_vlan_rx_add_vid     dsa_slave_port_obj_add
>>>                         |                         |
>>>                         +-------+         +-------+
>>>                                 |         |
>>>                                 v         v
>>>                              dsa_port_vlan_add
>>>
>>> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
>>
>> I would be keen on keeping this function just because it encapsulates the
>> details of creating the switchdev object and it may be useful to add
>> additional functionality later on (like the DSA master RX VLAN filtering?),
>> but would not object to its removal if others disagree.
>> --
>> Florian
> 
> Hmm, I don't think there's a lot of value in having it, it's confusing
> to have such a layered call stack, and it shouldn't be an exported
> symbol any longer in any case.
> Also, I already have a patch that calls vlan_vid_add(master) and having
> this dsa_port_vid_add() helper doesn't save much at all.

OK, I am convinced:

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian