linux-kernel - Re: [PATCH 2/2] PM / Runtime: document autosuspend-helper side effects

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Date:   Mon, 10 Apr 2017 09:36:03 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Johan Hovold <johan@...nel.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Alan Stern <stern@...land.harvard.edu>,
        Kevin Hilman <khilman@...libre.com>,
        Ulf Hansson <ulf.hansson@...aro.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] PM / Runtime: document autosuspend-helper side
 effects

* Johan Hovold <johan@...nel.org> [170410 04:41]:
> Document the fact that the autosuspend delay and enable helpers may
> change the power.usage_count and resume or suspend a device depending on
> the values of power.autosuspend_delay and power.use_autosuspend.
> 
> Note that this means that a driver must disable autosuspend before
> disabling runtime pm on probe errors and on driver unbind if the device
> is to be suspended upon return (as a negative delay may otherwise keep
> the device resumed).
> 
> Signed-off-by: Johan Hovold <johan@...nel.org>

Acked-by: Tony Lindgren <tony@...mide.com>