Re: [PATCH ver. 2] PM: add synchronous runtime interface for interrupt handlers

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On Wednesday, November 24, 2010, Alan Stern wrote:
> On Tue, 23 Nov 2010, Rafael J. Wysocki wrote:
> 
> > > Or maybe you think that when pm_runtime_put_sync detects the 
> > > usage_count has decremented to 0 and the device is irq-safe, it should 
> > > call rpm_suspend directly instead of calling rpm_idle?
> > 
> > That also would work for me, actually.
> 
> Okay, then consider this proposal.  I'll introduce a new
> pm_runtime_put_sync_suspend() function which decrements the usage_count
> and calls rpm_suspend directly if the count drops to 0.  Then interrupt
> handlers could use this function in place of pm_runtime_put_sync(),
> provided the device was irq-safe.
> 
> Not only that, pm_runtime_put_sync_suspend() would be available for
> anyone to use.  It must be reasonably common for runtime_idle routines
> to do nothing but call pm_runtime_suspend().  The new API call would
> save a little overhead.

Fine by me.

Thanks,
Rafael
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