On Sun, 3 Apr 2016, Krzysztof Kozlowski wrote: > Put a reminder that during device removal drivers should revert all PM > runtime changes from the probe. > > Signed-off-by: Krzysztof Kozlowski <k...@kernel.org> > > --- > > Changes since v1: > 1. Address Alan's comments. > --- > Documentation/power/runtime_pm.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/power/runtime_pm.txt > b/Documentation/power/runtime_pm.txt > index 7328cf85236c..1fd1fbe9ce95 100644 > --- a/Documentation/power/runtime_pm.txt > +++ b/Documentation/power/runtime_pm.txt > @@ -586,6 +586,10 @@ drivers to make their ->remove() callbacks avoid races > with runtime PM directly, > but also it allows of more flexibility in the handling of devices during the > removal of their drivers. > > +Drivers in ->remove() callback should undo the runtime PM changes done > +in ->probe(). Usually this means calling pm_runtime_disable(), > +pm_runtime_dont_use_autosuspend() etc. > + > The user space can effectively disallow the driver of the device to power > manage > it at run time by changing the value of its /sys/devices/.../power/control > attribute to "on", which causes pm_runtime_forbid() to be called. In > principle,
Acked-by: Alan Stern <st...@rowland.harvard.edu>
