[ofa-general] message is received but sender report error.

[Roland Dreier]

 > the receiver has successfully got an event, and
 > (compl.opcode&IBV_WC_RECV_RDMA_WITH_IMM) is true.
 > 
 > However, the sender got an completion with compl.status=12, which is
 > retry count exceeded, how is this possible ?
 > One thing I can tell is that receiver destroy the QP after receiving
 > above message.

I guess maybe it's possible to destroy the QP before the ACK is
generated?  Maybe the first ACK is dropped for some reason and the
responder QP is gone before it can resend the ACK?

 - R.