Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [RFD] Automatic suspend | Date | Fri, 27 Feb 2009 21:58:29 +0100 |
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On Friday 27 February 2009, Alan Stern wrote: > On Fri, 27 Feb 2009, Pavel Machek wrote: > > > > > > To summarize, we can: > > > * Use a refcount such that automatic suspend will only be possible if it's > > > equal to zero (but that need not be the only criterion). > > > * Use a per-device flag in dev_pm_info that will be set whenever the device > > > driver increases the refcount and unset whenever the driver decreases the > > > refcount. > > > * Use a per-process flag that will be set whenever the process increases the > > > refcount and unset whenever the process decreases the refcount. > > > > Yes, that sounds sane, and that's how reasonable wakelock > > implementation should look like. > > One small point: If you add a per-device flag and a per-process flag as > described above, then drivers and processes must not acquire nested > references. > > Obviously this is fixable, but it's worth mentioning...
Yes, it's important to remeber IMO.
Thanks, Rafael
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