[PATCH 09/10] PM / Domains: Store the provider in the PM domain structure

[...]

quoted

I also think you should extend this change, to also make the
of_genpd_del_provider() API to reset the genpd->provider = NULL.
Otherwise you can't track when a provider is removed.

Unfortunately that is not going to work. The function
of_genpd_remove_tail() (patch #10) uses the ->provider member to remove
the last domain for the given provider and of_genpd_del_provider() must
be called before hand.

Yes, of course - you are right!

Kind regards
Uffe