Re: [PATCH 1/9] PM: Add suspend block api.

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On Fri, 23 Apr 2010, Arve Hjønnevåg wrote:

> 2010/4/23 Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>:
> > On Thu, 22 Apr 2010, [UTF-8] Arve Hjønnevåg wrote:
> ...
> >> +Calling suspend_block when the suspend blocker is active or suspend_unblock when
> >> +it is not active has no effect. This allows drivers to update their state and
> >> +call suspend suspend_block or suspend_unblock based on the result.
> >
> > But suspend_block() and suspend_unblock() don't nest.  You should
> > mention this.
> >
> 
> I'm not sure what you mean by this? I think the first sentence
> dictates nesting is not supported.

That fact is implicit from the first sentence.  Mentioning it 
_explicitly_ will help people to understand more easily.  You don't 
have to add much; a parenthetical remark would be enough:

	Calling suspend_block when the suspend blocker is active or
	suspend_unblock when it is not active has no effect (i.e.,
	these functions don't nest).  This allows drivers to ...

Alan Stern

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