On Fri, 28 Oct 2016 09:17:04 +0200
Daniel Wagner [off-list ref] wrote:

So I went through the list of users and tried to identify which of them 
is going to make troubles. I found 4 users which are using 
complete_all() while IRQs are disabled. The rest looks like it just 
would work nice. I already fixed up a bunch of drivers which use 
complete_all() just to make really sure the single waiter is woken up. 
This list does only contain proper complete_all() users.

I wonder if we can just create a separate thread or workqueue that
performs the complete all, and have the callers of complete_all() that
are currently under irqs disabled simply wake up the thread/workqueue
to perform the complete_all() with interrupts enabled?

-- Steve