[openib-general] [PATCH] ib_cancel_mad API

[Sean Hefty]

>Returning -EBUSY from ib_cancel requires the caller to block until the send
>handler is invoked.  This in turn means that there needs to be code so that
>the send handler can wakeup the canceling thread once the send is complete.
>I don't see the difference between such synchronization requirements to the
>client and reference counting.

Note that returning -EBUSY from ib_cancel_mad would only indicate that a
callback *might* be invoked.  It could have already been called, which leads
me to think that no return value would be better than one that a client
tries to use.

Also, MAD agents are registered per port, not per HCA, since an agent is
tied to a specific QP.