Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c8681f14013d3ad2fc4fb4e30cfd4ea548f7a249
Commit: c8681f14013d3ad2fc4fb4e30cfd4ea548f7a249
Parent: 13ef5f44c3931dff1d75443a875e97b588d4b8f0
Author: Jack Morgenstein <[EMAIL PROTECTED]>
AuthorDate: Thu Jun 21 13:39:10 2007 -0700
Committer: Roland Dreier <[EMAIL PROTECTED]>
CommitDate: Thu Jun 21 13:39:10 2007 -0700
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 <[EMAIL PROTECTED]>
Signed-off-by: Roland Dreier <[EMAIL PROTECTED]>
---
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 ?
-
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