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Date:   Fri, 17 Feb 2017 15:58:18 -0800
From:   Kevin Hilman <>
To:     Viresh Kumar <>
Cc:     Rafael Wysocki <>,,
        Pavel Machek <>, Len Brown <>,,,,
        Vincent Guittot <>,,,,,
Subject: Re: [PATCH V2 5/6] PM / domain: Save/restore performance state at runtime suspend/resume

Viresh Kumar <> writes:

> With runtime PM, the devices get suspended while the system is up and
> running in order to save power. At such times, it is important to
> re-evaluate the required performance state of the domain, in order to
> choose a lower state if possible.
> This patch updates the genpd suspend/resume callbacks to do that.
> Signed-off-by: Viresh Kumar <>

Doesn't this assume that a device in the domain would need to change
performance state while runtime suspended.  How would that happen?

Rather than adding this here, I would think that drivers would instead
remove any QoS requests before going into runtime suspend, which would
trigger an update before runtime suspending.


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