[PATCH V2 1/5] mlx4, mlx5, mthca: Expose max_sge_rd correctly

[Steve Wise]

From: Sagi Grimberg <sa...@mellanox.com>

Applications must not assume that max_sge and max_sge_rd
are the same, Hence expose max_sge_rd correctly as well.

Reported-by: Steve Wise <sw...@opengridcomputing.com>
Signed-off-by: Sagi Grimberg <sa...@mellanox.com>
---
 drivers/infiniband/hw/mlx4/main.c            |    1 +
 drivers/infiniband/hw/mlx5/main.c            |    1 +
 drivers/infiniband/hw/mthca/mthca_provider.c |    1 +
 3 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/hw/mlx4/main.c 
b/drivers/infiniband/hw/mlx4/main.c
index 166da78..81c342f 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -229,6 +229,7 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
        props->max_qp_wr           = dev->dev->caps.max_wqes - 
MLX4_IB_SQ_MAX_SPARE;
        props->max_sge             = min(dev->dev->caps.max_sq_sg,
                                         dev->dev->caps.max_rq_sg);
+       props->max_sge_rd = props->max_sge;
        props->max_cq              = dev->dev->quotas.cq;
        props->max_cqe             = dev->dev->caps.max_cqes;
        props->max_mr              = dev->dev->quotas.mpt;
diff --git a/drivers/infiniband/hw/mlx5/main.c 
b/drivers/infiniband/hw/mlx5/main.c
index c6cb26e..a2bcd96 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -137,6 +137,7 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
        max_sq_sg = (gen->max_sq_desc_sz - sizeof(struct mlx5_wqe_ctrl_seg)) /
                sizeof(struct mlx5_wqe_data_seg);
        props->max_sge = min(max_rq_sg, max_sq_sg);
+       props->max_sge_rd = props->max_sge;
        props->max_cq              = 1 << gen->log_max_cq;
        props->max_cqe             = gen->max_cqes - 1;
        props->max_mr              = 1 << gen->log_max_mkey;
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c 
b/drivers/infiniband/hw/mthca/mthca_provider.c
index 93ae51d..dc2d48c 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -97,6 +97,7 @@ static int mthca_query_device(struct ib_device *ibdev, struct 
ib_device_attr *pr
        props->max_qp              = mdev->limits.num_qps - 
mdev->limits.reserved_qps;
        props->max_qp_wr           = mdev->limits.max_wqes;
        props->max_sge             = mdev->limits.max_sg;
+       props->max_sge_rd          = props->max_sge;
        props->max_cq              = mdev->limits.num_cqs - 
mdev->limits.reserved_cqs;
        props->max_cqe             = mdev->limits.max_cqes;
        props->max_mr              = mdev->limits.num_mpts - 
mdev->limits.reserved_mrws;

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