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>

3 files changed, 9 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
index 0d13fe0a260b..3d6d9461c31d 100644
--- a/drivers/infiniband/hw/ehca/ehca_classes.h
+++ b/drivers/infiniband/hw/ehca/ehca_classes.h
@@ -160,6 +160,7 @@ struct ehca_qp {
         };
         u32 qp_type;
         enum ehca_ext_qp_type ext_type;
+        enum ib_qp_state state;
         struct ipz_queue ipz_squeue;
         struct ipz_queue ipz_rqueue;
         struct h_galpas galpas;
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index 3eb14a52cbf2..5a653d75fd2e 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -550,6 +550,7 @@ static struct ehca_qp *internal_create_qp(
         spin_lock_init(&my_qp->spinlock_r);
         my_qp->qp_type = qp_type;
         my_qp->ext_type = parms.ext_type;
+        my_qp->state = IB_QPS_RESET;
 
         if (init_attr->recv_cq)
                 my_qp->recv_cq =
@@ -1508,6 +1509,8 @@ static int internal_modify_qp(struct ib_qp *ibqp,
         if (attr_mask & IB_QP_QKEY)
                 my_qp->qkey = attr->qkey;
 
+        my_qp->state = qp_new_state;
+
 modify_qp_exit2:
         if (squeue_locked) { /* this means: sqe -> rts */
                 spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
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);