On Mon, Sep 30, 2019 at 10:09 AM Greg KH [off-list ref] wrote:

Why is a new way of doing configuration needed here?  What does this
provide that the current code doesn't already do?

The fieldbus core doesn't have a configuration mechanism yet. This
patch adds one.
I deliberately omitted configuration when the core was added - I wanted to keep
complexity to a minimum. I'm sorry I didn't make this clearer.

As a result, the current core can only work with cards that either don't require
any config, or get it straight from the network/PLC. Profinet is a good example
of this. Most cards do require config however. So does the hms flnet card, which
I tried to add in the patchset.

And have you looked at the recent configfs fixes to make sure this code
still works with them?  I can't test this so rebasing this on 5.4-rc1
would be good for you to do first.

Thanks for the heads-up! I will test that out.