[net-next 02/16] net/mlx5e: Convert mlx5e_get_max_sq_wqebbs to u8

[Saeed Mahameed <saeed@kernel.org>]

From: Maxim Mikityanskiy <maximmi@nvidia.com>

The return value of mlx5e_get_max_sq_wqebbs is clamped down to
MLX5_SEND_WQE_MAX_WQEBBS = 16, which fits into u8. This commit changes
the return type of this function to u8 for stricter type safety.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 648a178e8db8..05126c6ae13d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -227,10 +227,12 @@ static inline int mlx5e_get_max_num_channels(struct mlx5_core_dev *mdev)
  * bytes units. Driver hardens the limitation to 1KB (16
  * WQEBBs), unless firmware capability is stricter.
  */
-static inline u16 mlx5e_get_max_sq_wqebbs(struct mlx5_core_dev *mdev)
+static inline u8 mlx5e_get_max_sq_wqebbs(struct mlx5_core_dev *mdev)
 {
-	return min_t(u16, MLX5_SEND_WQE_MAX_WQEBBS,
-		     MLX5_CAP_GEN(mdev, max_wqe_sz_sq) / MLX5_SEND_WQE_BB);
+	BUILD_BUG_ON(MLX5_SEND_WQE_MAX_WQEBBS > U8_MAX);
+
+	return (u8)min_t(u16, MLX5_SEND_WQE_MAX_WQEBBS,
+			 MLX5_CAP_GEN(mdev, max_wqe_sz_sq) / MLX5_SEND_WQE_BB);
 }
 
 static inline u8 mlx5e_get_sw_max_sq_mpw_wqebbs(u8 max_sq_wqebbs)
-- 
2.37.3