Re: [PATCH] spi/pl022: Activate resourses before deactivate them in suspend

[Linus Walleij <linus.walleij@linaro.org>]

On Sat, Oct 27, 2012 at 11:46 PM, Mark Brown
<broonie@opensource.wolfsonmicro.com> wrote:
> On Fri, Oct 05, 2012 at 09:43:32AM +0200, Ulf Hansson wrote:
>
>> To be able to deactivate resourses in suspend, the resourses must
>> first be surely active. This is done with a pm_runtime_get_sync.
>> Once the resourses are restored to active state again in resume,
>> the runtime pm usage count can be decreased with a pm_runtime_put.
>
> The PM core will ensure devices are runtime resumed before we enter
> suspend precisely due to this sort of issue.

I asked the very same question to Ulf (in speech, sorry
so you couldn't see it...)

So I guess we are talking about drivers/base/main.c

in device_prepare()
pm_runtime_get_noresume() is called
and in device_complete()
pm_runtime_put_sync() is called.

Both put into current for in
commit 88d26136a256576e444db312179e17af6dd0ea87
on sep 19th.

Yes it seems like it will do the job.

Ulf can you comment on this...

Yours,
Linus Walleij