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| author | Jack Morgenstein <jackm@dev.mellanox.co.il> | 2007-06-21 13:39:10 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-06-21 13:39:10 -0700 |
| commit | c8681f14013d3ad2fc4fb4e30cfd4ea548f7a249 (patch) | |
| tree | 4ea047565dcc3340dcd473fca5579a5cb2de349a /drivers/infiniband | |
| parent | 13ef5f44c3931dff1d75443a875e97b588d4b8f0 (diff) | |
| download | op-kernel-dev-c8681f14013d3ad2fc4fb4e30cfd4ea548f7a249.zip op-kernel-dev-c8681f14013d3ad2fc4fb4e30cfd4ea548f7a249.tar.gz | |
IB/mlx4: Correct max_srq_wr returned from mlx4_ib_query_device()
We need to keep a spare entry in the SRQ so that there always is a
next WQE available when posting receives (so that we can tell the
difference between a full queue and an empty queue). So subtract 1
from the value HW gives us before reporting the limit on SRQ entries
to consumers.
Found by Mellanox QA.
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 1095c82..c591616 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -120,7 +120,7 @@ static int mlx4_ib_query_device(struct ib_device *ibdev, props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma; props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp; props->max_srq = dev->dev->caps.num_srqs - dev->dev->caps.reserved_srqs; - props->max_srq_wr = dev->dev->caps.max_srq_wqes; + props->max_srq_wr = dev->dev->caps.max_srq_wqes - 1; props->max_srq_sge = dev->dev->caps.max_srq_sge; props->local_ca_ack_delay = dev->dev->caps.local_ca_ack_delay; props->atomic_cap = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ? |
