Re: subtle pm_runtime_put_sync race and sdio functions

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On Sat, 11 Dec 2010, Ohad Ben-Cohen wrote:

> By allowing nested suspend sequences we even squeeze some more power
> by suspending devices earlier, and saving some CPU cycles (due to the
> avoided context switches), so it sounds like a win-win...

There's a trade-off, and it's not clear which approach is best.

> But of course I may be overlooking a real problem this may pose.. I
> haven't spotted any, but it does feel like a significant behavior
> change, hence the cautious approach :)

I don't think there would be any real problems.  Hard to know for sure 
without trying it...

Alan Stern

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