Re: [PATCH v7 3/4] block: implement runtime pm strategy

[Alan Stern]

On Fri, 18 Jan 2013, Aaron Lu wrote:

> > Either you have to make sure the q->nr_pending is always correct, even 
> > when runtime PM isn't being used, or else the caller has to make sure 
> > that no I/O takes place before blk_pm_runtime_init is called.
> 
> I think we can say:
> blk_pm_runtime_init can't be called after any requests have been
> submitted but not finished.
> Sounds more accurate?

Okay.  I think you can add (in parentheses) that in most cases drivers
should call the routine before any I/O has taken place.

Alan Stern

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