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net/mlx5: Enable 4K UAR only when page size is bigger than 4K

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When the page size isn't bigger than 4K, there is no added value of enabling 4K
UAR feature in the Firmware.

Modified the condition of enabling the 4K UAR accordingly.

Fixes: f502d83495 ("net/mlx5: Activate support for 4K UARs")
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Majd Dibbiny 2017-05-28 14:47:56 +03:00 committed by Saeed Mahameed
parent 53acd76ce5
commit 91828bd899
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/mellanox/mlx5/core/main.c
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@ -537,8 +537,10 @@ static int handle_hca_cap(struct mlx5_core_dev *dev)
/* disable cmdif checksum */
MLX5_SET(cmd_hca_cap, set_hca_cap, cmdif_checksum, 0);
/* If the HCA supports 4K UARs use it */
if (MLX5_CAP_GEN_MAX(dev, uar_4k))
/* Enable 4K UAR only when HCA supports it and page size is bigger
* than 4K.
*/
if (MLX5_CAP_GEN_MAX(dev, uar_4k) && PAGE_SIZE > 4096)
MLX5_SET(cmd_hca_cap, set_hca_cap, uar_4k, 1);
MLX5_SET(cmd_hca_cap, set_hca_cap, log_uar_page_sz, PAGE_SHIFT - 12);