From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tom Lyon <pugs@cisco.com>
Subject: question about driver's runtime_suspend
Date: Fri, 3 Sep 2010 15:20:19 -0700
Message-ID: <201009031520.19452.pugs@cisco.com>
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To: rjw@sisk.pl, linux-pm@lists.linux-foundation.org
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Hi. I am looking at supporting the new PM stuff in my VFIO "driver" - which 
allows user level drivers for PCI* devices.

When runtime_suspend is invoked, is it allowed to sleep while determining 
whether the device can be suspended?  If not, does returning -EAGAIN mean that 
it will be called again after some interval? 

I would like to notify the user level that a suspend is desired, and then wait 
for it to tell the vfio driver whether or not the suspend is OK.

Thanks for any help.