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The cm_reset_to_idle() call before formatting event changed the CM_ID
state from IB_CM_REQ_RCVD to be IB_CM_IDLE. It caused to wrong value of
CM_REJ_MESSAGE_REJECTED field.

The result of that was that rdma_reject() calls in the passive side didn't
generate RDMA_CM_EVENT_REJECTED event in the active side.

Fixes: 81ddb41f ("RDMA/cm: Allow ib_send_cm_rej() to be done under lock")
Link: https://lore.kernel.org/r/20200406173242.1465911-1-leon@kernel.org

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>