Re: [PATCH] PM: Acquire device locks on suspend

On Sat, 5 Jan 2008, Rafael J. Wysocki wrote:

quoted

Another thing to watch out for: Just in case somebody ends up calling
destroy_suspended_device(dev) from within dev's own resume method, you 
should interchange the resume_device() and the list_move_tail() 
calls in dpm_resume().

However, if we unregister them all at once after releasing pm_sleep_rwsem,
that shouldn't be necessary, right?

It's still necessary, because destroy_suspended_device() still has to
move the device from one list to another.  You don't want it to end up 
on the dpm_locked list.

Alan Stern