1 files changed, 20 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index 26d5161fde07..f7d234295efe 100644
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -417,6 +417,7 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 {
         struct mthca_dev *dev = to_mdev(ibsrq->device);
         struct mthca_srq *srq = to_msrq(ibsrq);
+        __be32 doorbell[2];
         unsigned long flags;
         int err = 0;
         int first_ind;
@@ -432,6 +433,25 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
         first_ind = srq->first_free;
 
         for (nreq = 0; wr; ++nreq, wr = wr->next) {
+                if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) {
+                        nreq = 0;
+
+                        doorbell[0] = cpu_to_be32(first_ind << srq->wqe_shift);
+                        doorbell[1] = cpu_to_be32(srq->srqn << 8);
+
+                        /*
+                         * Make sure that descriptors are written
+                         * before doorbell is rung.
+                         */
+                        wmb();
+
+                        mthca_write64(doorbell,
+                                      dev->kar + MTHCA_RECEIVE_DOORBELL,
+                                      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+
+                        first_ind = srq->first_free;
+                }
+
                 ind = srq->first_free;
 
                 if (ind < 0) {
@@ -494,8 +514,6 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
         }
 
         if (likely(nreq)) {
-                __be32 doorbell[2];
-
                 doorbell[0] = cpu_to_be32(first_ind << srq->wqe_shift);
                 doorbell[1] = cpu_to_be32((srq->srqn << 8) | nreq);