Placing a qp in state IBV_QPS_ERR via ibv_modify_qp, and then posting a receive via ibv_post_recv, results in ibv_post_recv returning success but no completion ever being posted to the completion queue. This was tested on 4.20. The Infiniband specification indicates that the ibv_post_recv should succeed and then a completion should be posted to the completion queue (indicating the command failed). This is the behavior we see on the physical NICs we've tested with. Since rxe is emulating RoCE, I believe this behavior should be changed. Note that posting a send does work as expected. Thanks, Ben
