[ewg] [PATCH] IB/ehca: Protect QP against destroying until all async events for it are handled.

[Roland Dreier]

 > We are not sure if this should be fixed in the driver or in uverbs itself.
 > Roland, what's your opinion about this?

Would be nice to be able to fix it in uverbs but I don't see how.  In
particular a kernel consumer has to have the same guarantee that no
async events will come in after destroy QP returns.  And I don't see any
way generic code can provide a guarantee about what low-level driver
code may do internally.