IB/ehca: Prevent posting of SQ WQEs if QP not in RTS

...as required by IB Spec, C10-29.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c
index a20bbf466188..0b2359e2757a 100644
--- a/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ b/drivers/infiniband/hw/ehca/ehca_reqs.c
@@ -421,6 +421,11 @@ int ehca_post_send(struct ib_qp *qp,
         int ret = 0;
         unsigned long flags;
 
+        if (unlikely(my_qp->state != IB_QPS_RTS)) {
+                ehca_err(qp->device, "QP not in RTS state  qpn=%x", qp->qp_num);
+                return -EINVAL;
+        }
+
         /* LOCK the QUEUE */
         spin_lock_irqsave(&my_qp->spinlock_s, flags);