patches/kernel/0013-net-mlx5-Adjust-log_max_qp-to-be-18-at-most.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: Maher Sanalla <msanalla@nvidia.com>
   3 Date: Sun, 24 Jul 2022 11:28:21 +0300
   4 Subject: [PATCH] net/mlx5: Adjust log_max_qp to be 18 at most
   5
   6 [ Upstream commit a6e9085d791f8306084fd5bc44dd3fdd4e1ac27b ]
   7
   8 The cited commit limited log_max_qp to be 17 due to FW capabilities.
   9 Recently, it turned out that there are old FW versions that supported
  10 more than 17, so the cited commit caused a degradation.
  11
  12 Thus, set the maximum log_max_qp back to 18 as it was before the
  13 cited commit.
  14
  15 Fixes: 7f839965b2d7 ("net/mlx5: Update log_max_qp value to be 17 at most")
  16 Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
  17 Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
  18 Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
  19 Signed-off-by: Sasha Levin <sashal@kernel.org>
  20 Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
  21 ---
  22  drivers/net/ethernet/mellanox/mlx5/core/main.c | 2 +-
  23  1 file changed, 1 insertion(+), 1 deletion(-)
  24
  25 diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
  26 index ef196cb764e2..2ad8027cb745 100644
  27 --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
  28 +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
  29 @@ -526,7 +526,7 @@ static int handle_hca_cap(struct mlx5_core_dev *dev, void *set_ctx)
  30
  31         /* Check log_max_qp from HCA caps to set in current profile */
  32         if (prof->log_max_qp == LOG_MAX_SUPPORTED_QPS) {
  33 -               prof->log_max_qp = min_t(u8, 17, MLX5_CAP_GEN_MAX(dev, log_max_qp));
  34 +               prof->log_max_qp = min_t(u8, 18, MLX5_CAP_GEN_MAX(dev, log_max_qp));
  35         } else if (MLX5_CAP_GEN_MAX(dev, log_max_qp) < prof->log_max_qp) {
  36                 mlx5_core_warn(dev, "log_max_qp value in current profile is %d, changing it to HCA capability limit (%d)\n",
  37                                prof->log_max_qp,