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

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: d34b9228f6ff ("net/mlx5: Activate support for 4K UARs")
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index af945edfee1905dbe676218cb53123535a37171f..4f577a5abf884645910203aace25ad9605e171d8 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -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);