1 files changed, 18 insertions, 19 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index 760c418d5bc..dd4e13303e9 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -730,15 +730,16 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
         }
 
         if (attr_mask & IB_QP_ACCESS_FLAGS) {
+                qp_context->params2 |=
+                        cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE ?
+                                    MTHCA_QP_BIT_RWE : 0);
+
                 /*
-                 * Only enable RDMA/atomics if we have responder
-                 * resources set to a non-zero value.
+                 * Only enable RDMA reads and atomics if we have
+                 * responder resources set to a non-zero value.
                  */
                 if (qp->resp_depth) {
                         qp_context->params2 |=
-                                cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE ?
-                                            MTHCA_QP_BIT_RWE : 0);
-                        qp_context->params2 |=
                                 cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_READ ?
                                             MTHCA_QP_BIT_RRE : 0);
                         qp_context->params2 |=
@@ -759,31 +760,27 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
                 if (qp->resp_depth && !attr->max_dest_rd_atomic) {
                         /*
                          * Lowering our responder resources to zero.
-                         * Turn off RDMA/atomics as responder.
-                         * (RWE/RRE/RAE in params2 already zero)
+                         * Turn off reads RDMA and atomics as responder.
+                         * (RRE/RAE in params2 already zero)
                          */
-                        qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
-                                                                MTHCA_QP_OPTPAR_RRE |
+                        qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRE |
                                                                 MTHCA_QP_OPTPAR_RAE);
                 }
 
                 if (!qp->resp_depth && attr->max_dest_rd_atomic) {
                         /*
                          * Increasing our responder resources from
-                         * zero.  Turn on RDMA/atomics as appropriate.
+                         * zero.  Turn on RDMA reads and atomics as
+                         * appropriate.
                          */
                         qp_context->params2 |=
-                                cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_WRITE ?
-                                            MTHCA_QP_BIT_RWE : 0);
-                        qp_context->params2 |=
                                 cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_READ ?
                                             MTHCA_QP_BIT_RRE : 0);
                         qp_context->params2 |=
                                 cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_ATOMIC ?
                                             MTHCA_QP_BIT_RAE : 0);
 
-                        qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
-                                                                MTHCA_QP_OPTPAR_RRE |
+                        qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRE |
                                                                 MTHCA_QP_OPTPAR_RAE);
                 }
 
@@ -921,10 +918,12 @@ static void mthca_adjust_qp_caps(struct mthca_dev *dev,
         else
                 qp->max_inline_data = max_data_size - MTHCA_INLINE_HEADER_SIZE;
 
-        qp->sq.max_gs = max_data_size / sizeof (struct mthca_data_seg);
-        qp->rq.max_gs = (min(dev->limits.max_desc_sz, 1 << qp->rq.wqe_shift) -
-                        sizeof (struct mthca_next_seg)) /
-                        sizeof (struct mthca_data_seg);
+        qp->sq.max_gs = min_t(int, dev->limits.max_sg,
+                              max_data_size / sizeof (struct mthca_data_seg));
+        qp->rq.max_gs = min_t(int, dev->limits.max_sg,
+                               (min(dev->limits.max_desc_sz, 1 << qp->rq.wqe_shift) -
+                                sizeof (struct mthca_next_seg)) /
+                               sizeof (struct mthca_data_seg));
 }
 
 /*