Re: [PATCH net-next 0/4] Automatically manage DSA master interface state

On 1/26/2021 5:00 PM, Vladimir Oltean wrote:

From: Vladimir Oltean <vladimir.oltean@nxp.com>

This patch series adds code that makes DSA open the master interface
automatically whenever one user interface gets opened, either by the
user, or by various networking subsystems: netconsole, nfsroot.
With that in place, we can remove some of the places in the network
stack where DSA-specific code was sprinkled.

Vladimir Oltean (4):
  net: dsa: automatically bring up DSA master when opening user port
  net: dsa: automatically bring user ports down when master goes down
  Revert "net: Have netpoll bring-up DSA management interface"
  Revert "net: ipv4: handle DSA enabled master network devices"

I really like all patches but number #2, though I don't believe there
are existing use cases besides you one you described where it makes
sense to keep a switch in an unmanaged mode being "headless" with its
CPU port down, while the user-facing ports are up.
-- 
Florian