[v1] net/mlx5: Fix return type mismatch in mlx5_esw_vport_vhca_id()

[PATCH] net/mlx5: Fix return type mismatch in mlx5_esw_vport_vhca_id()

Posted by Zeng Chi 1 month ago

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)'

Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
---
 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

Re: [PATCH] net/mlx5: Fix return type mismatch in mlx5_esw_vport_vhca_id()

Posted by Markus Elfring 3 weeks, 5 days ago

…
> This patch fixes this smatch report:
…

See also once more:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.19-rc5#n94

Regards,
Markus

Re: [PATCH] net/mlx5: Fix return type mismatch in mlx5_esw_vport_vhca_id()

Posted by Tariq Toukan 3 weeks, 5 days ago


On 09/01/2026 11:06, Zeng Chi wrote:
> From: Zeng Chi <zengchi@kylinos.cn>
> 

Thanks for your patch.

Please specify target branch.

> 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)'
> 

Missing Fixes tag.

> Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
> ---
>   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 */


Regards,
Tariq