On Fri, Aug 27, 2021 at 1:11 PM Andrew Lunn [off-list ref] wrote:

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I've not yet looked at plain Ethernet drivers. This pattern could also
exist there. And i wonder about other complex structures, i2c bus
multiplexors, you can have interrupt controllers as i2c devices,
etc. So the general case could exist in other places.

I haven't seen any generic issues like this reported so far. It's only
after adding phy-handle that we are hitting these issues with DSA
switches.

Can you run your parser over the 2250 DTB blobs and see how many
children have dependencies on a parent? That could give us an idea how
many moles need whacking. And maybe, where in the tree they are
hiding?

You are only responding to part of my email. As I said in my previous
email: "There are plenty of cases where it's better to delay the child
device's probe until the parent finishes. You even gave an example[7]
where it would help avoid unnecessary deferred probes." Can you please
give your thoughts on the rest of the points I made too?

-Saravana