Re: [PATCH v3 2/2] PM / Runtime: Add pm_runtime_enable_recursive

[Alan Stern]

On Tue, 19 May 2015, Tomeu Vizoso wrote:

> This function makes less cumbersome to enable runtime PM in a device and
> its descendants.
> 
> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>

I don't see the point of this.  In the scenario you have in mind, are
the device and all its descendants registered by the same
subsystem/driver?  If they are, can't the subsystem/driver code enable
runtime PM for each of them when they are registered, by adding a
single call in the right spot?

If they don't all belong to the same subsystem/driver, who is going to 
call your pm_runtime_enable_recursive routine?  No single caller will 
have the right to enable runtime PM for all these devices.

Alan Stern

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