On Tue, Jan 27, 2015 at 9:13 PM, Ulf Hansson [off-list ref] wrote:

While adding error handling of genpd's ->attach_dev() callback, I realized that
we also had a need to re-structure some of the code which deals with
adding/removing devices to genpd. Especially the APIs, __pm_genpd_add_device()
and pm_genpd_remove_device() deserved some attention.

Patch 1 -> 4, can be considered as more simple cleanups and should not impact
the behavior for current clients using the APIs.

Patch 5, eliminates a mutex for generic_pm_domain_data by re-order the
initialization/cleanup of dev_pm_qos notifiers.

Patch 6, move some code around to fix a potenial memory leakage of a struct
pm_subsys_data.

Patch 7, code restructuring which impacts locking behavior while adding/removing
devices. Should improve code readability and decrease critical regions of
holding locks.

Patch 8, Adds error handling of genpd's ->attach_dev() callback


Ulf Hansson (8):
  PM / Domains: Rename __pm_genpd_alloc|free_dev_data()
  PM / Domains: Remove reference counting for the generic_pm_domain_data
  PM / Domains: Don't allow an existing generic_pm_domain_data
  PM / Domains: Don't check for an existing device when adding a new
  PM / Domains: Eliminate the mutex for the generic_pm_domain_data
  PM / Domains: Free pm_subsys_data in error path in
    __pm_genpd_add_device()
  PM / Domains: Re-order initialization of generic_pm_domain_data
  PM / Domains: Handle errors from genpd's ->attach_dev() callback

Looks OK, and tested on sh73a0/kzm9g-multiplatform with PM domains
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds