[PATCH 2/4] PM / Domains: Don't allow an existing generic PM domain data

[Kevin Hilman]

Ulf Hansson <ulf.hansson at linaro.org> writes:

> While adding devices to the generic PM domain we allocate data for the
> struct generic_pm_domain_data.
>
> Don't allow existing generic_pm_domain_data in this case, since that
> indicates the device is already being added from another context. Let's
> instead return an error.
>
> Signed-off-by: Ulf Hansson <ulf.hansson at linaro.org>

Similar to PATCH 1/4, it would be good to summarize/remind why this
feature was added in the first place, and why it's not longer needed.

Kevin