RDMA/bnxt_re: Fix RQE posting logic

[karo-tx-linux.git] / drivers / infiniband / hw / bnxt_re / ib_verbs.c

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 08e7e59df28c620f0a596b0e57cc4a20822f1296..491932e70638f0df74c6a79c8b2f45ea1161a725 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -1249,6 +1249,7 @@ struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
 
        qp->ib_qp.qp_num = qp->qplib_qp.id;
        spin_lock_init(&qp->sq_lock);
+       spin_lock_init(&qp->rq_lock);
 
        if (udata) {
                struct bnxt_re_qp_resp resp;
@@ -2281,7 +2282,10 @@ int bnxt_re_post_recv(struct ib_qp *ib_qp, struct ib_recv_wr *wr,
        struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
        struct bnxt_qplib_swqe wqe;
        int rc = 0, payload_sz = 0;
+       unsigned long flags;
+       u32 count = 0;
 
+       spin_lock_irqsave(&qp->rq_lock, flags);
        while (wr) {
                /* House keeping */
                memset(&wqe, 0, sizeof(wqe));
@@ -2310,9 +2314,21 @@ int bnxt_re_post_recv(struct ib_qp *ib_qp, struct ib_recv_wr *wr,
                        *bad_wr = wr;
                        break;
                }
+
+               /* Ring DB if the RQEs posted reaches a threshold value */
+               if (++count >= BNXT_RE_RQ_WQE_THRESHOLD) {
+                       bnxt_qplib_post_recv_db(&qp->qplib_qp);
+                       count = 0;
+               }
+
                wr = wr->next;
        }
-       bnxt_qplib_post_recv_db(&qp->qplib_qp);
+
+       if (count)
+               bnxt_qplib_post_recv_db(&qp->qplib_qp);
+
+       spin_unlock_irqrestore(&qp->rq_lock, flags);
+
        return rc;
 }