IB/mthca: Make fence flag work for send work requests

The fence bit needs to be set in the doorbell too, not just the WQE.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index cd8b6721ac9c..157b4f8ac407 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -99,6 +99,10 @@ enum {
         MTHCA_QP_BIT_RSC = 1 <<  3
 };
 
+enum {
+        MTHCA_SEND_DOORBELL_FENCE = 1 << 5
+};
+
 struct mthca_qp_path {
         __be32 port_pkey;
         u8     rnr_retry;
@@ -1502,7 +1506,7 @@ int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
         int i;
         int size;
         int size0 = 0;
-        u32 f0 = 0;
+        u32 f0;
         int ind;
         u8 op0 = 0;
 
@@ -1686,6 +1690,8 @@ int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
                 if (!size0) {
                         size0 = size;
                         op0   = mthca_opcode[wr->opcode];
+                        f0    = wr->send_flags & IB_SEND_FENCE ?
+                                MTHCA_SEND_DOORBELL_FENCE : 0;
                 }
 
                 ++ind;
@@ -1843,7 +1849,7 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
         int i;
         int size;
         int size0 = 0;
-        u32 f0 = 0;
+        u32 f0;
         int ind;
         u8 op0 = 0;
 
@@ -2051,6 +2057,8 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
                 if (!size0) {
                         size0 = size;
                         op0   = mthca_opcode[wr->opcode];
+                        f0    = wr->send_flags & IB_SEND_FENCE ?
+                                MTHCA_SEND_DOORBELL_FENCE : 0;
                 }
 
                 ++ind;