From: Zeng Chi <zengchi@kylinos.cn>

The function mlx5_esw_vport_vhca_id() is declared to return bool,
but returns -EOPNOTSUPP (-45), which is an int error code. This
causes a signedness bug as reported by smatch.

This patch fixes this smatch report:
drivers/net/ethernet/mellanox/mlx5/core/eswitch.h:981 mlx5_esw_vport_vhca_id()
warn: signedness bug returning '(-45)'

Fixes: 1baf30426553 ("net/mlx5: E-Switch, Set/Query hca cap via vhca id")
Reviewed-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
---
v2 -> v3:
- Shortened the commit ID in the `Fixes:` tag to 12 characters as suggested.
- Added a `Reviewed-by:` tag from Parav Pandit <parav@nvidia.com>.

v2:Added the required Fixes tag and specified target branch net in subject prefix
---
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index ad1073f7b79f..e7fe43799b23 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -1009,7 +1009,7 @@ mlx5_esw_host_functions_enabled(const struct mlx5_core_dev *dev)
 static inline bool
 mlx5_esw_vport_vhca_id(struct mlx5_eswitch *esw, u16 vportn, u16 *vhca_id)
 {
-	return -EOPNOTSUPP;
+	return false;
 }
 
 #endif /* CONFIG_MLX5_ESWITCH */
-- 
2.25.1

On 23/01/2026 10:57, Zeng Chi wrote:
> From: Zeng Chi <zengchi@kylinos.cn>
> 
> The function mlx5_esw_vport_vhca_id() is declared to return bool,
> but returns -EOPNOTSUPP (-45), which is an int error code. This
> causes a signedness bug as reported by smatch.
> 
> This patch fixes this smatch report:
> drivers/net/ethernet/mellanox/mlx5/core/eswitch.h:981 mlx5_esw_vport_vhca_id()
> warn: signedness bug returning '(-45)'
> 
> Fixes: 1baf30426553 ("net/mlx5: E-Switch, Set/Query hca cap via vhca id")
> Reviewed-by: Parav Pandit <parav@nvidia.com>
> Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
> ---
> v2 -> v3:
> - Shortened the commit ID in the `Fixes:` tag to 12 characters as suggested.
> - Added a `Reviewed-by:` tag from Parav Pandit <parav@nvidia.com>.
> 
> v2:Added the required Fixes tag and specified target branch net in subject prefix
> ---
>   drivers/net/ethernet/mellanox/mlx5/core/eswitch.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
> index ad1073f7b79f..e7fe43799b23 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
> @@ -1009,7 +1009,7 @@ mlx5_esw_host_functions_enabled(const struct mlx5_core_dev *dev)
>   static inline bool
>   mlx5_esw_vport_vhca_id(struct mlx5_eswitch *esw, u16 vportn, u16 *vhca_id)
>   {
> -	return -EOPNOTSUPP;
> +	return false;
>   }
>   
>   #endif /* CONFIG_MLX5_ESWITCH */

Reviewed-by: Tariq Toukan <tariqt@nvidia.com>