question about bus_suspend and bus_resume

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Hi,
What is the expected behavior if a host controller does not implement 
bus_suspend and bus_resume?  I am seeing that with the HWA HCD, kworker 
and khubd peg the CPU at 100% because the kernel is constantly calling 
hcd_bus_suspend and hcd_bus_resume.  The calls to hcd_bus_suspend and 
hcd_bus_resume fail because hcd->bus_suspend and hcd->bus_resume are NULL.  
I have reproduced this behaviour using 3.11rc1 all the way back to 3.9.2.

Thanks,
Tom
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