1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_ruc.c b/drivers/infiniband/hw/ipath/ipath_ruc.c
index 854deb56ac02..85256747d8a1 100644
--- a/drivers/infiniband/hw/ipath/ipath_ruc.c
+++ b/drivers/infiniband/hw/ipath/ipath_ruc.c
@@ -194,6 +194,8 @@ int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only)
                         ret = 0;
                         goto bail;
                 }
+                /* Make sure entry is read after head index is read. */
+                smp_rmb();
                 wqe = get_rwqe_ptr(rq, tail);
                 if (++tail >= rq->size)
                         tail = 0;