Messages in this thread |  | | Date | Fri, 18 Jan 2013 10:26:38 -0500 (EST) | From | Alan Stern <> | Subject | Re: [PATCH v7 3/4] block: implement runtime pm strategy |
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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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