diff --git a/[refs] b/[refs]
index 5991b46956ce..3f0a08e28d37 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6eddb5cb906ac5c9a17a1b76464eadacd88b6c92
+refs/heads/master: d4cb0784fd1ea99ef3d20526811bd5608146fe60
diff --git a/trunk/drivers/infiniband/hw/mthca/mthca_provider.c b/trunk/drivers/infiniband/hw/mthca/mthca_provider.c
index a2eae8a30167..8f89ba7c9147 100644
--- a/trunk/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/trunk/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -115,6 +115,16 @@ static int mthca_query_device(struct ib_device *ibdev,
 	props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 	props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 					   props->max_mcast_grp;
+	/*
+	 * If Sinai memory key optimization is being used, then only
+	 * the 8-bit key portion will change.  For other HCAs, the
+	 * unused index bits will also be used for FMR remapping.
+	 */
+	if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
+		props->max_map_per_fmr = 255;
+	else
+		props->max_map_per_fmr =
+			(1 << (32 - long_log2(mdev->limits.num_mpts))) - 1;
 
 	err = 0;
  out: