Re: [PATCH net v1] net/mlx5: Fix HCA caps leak on notifier init failure

[Tariq Toukan <tariqt@nvidia.com>]

On 15/04/2026 3:49, Prathamesh Deshpande wrote:
> mlx5_mdev_init() allocates HCA caps via mlx5_hca_caps_alloc() before
> calling mlx5_notifiers_init(). If notifier initialization fails, the
> error path jumps to err_hca_caps and skips mlx5_hca_caps_free(), leaking
> allocated caps.
> 
> Add a dedicated unwind label for notifier-init failure that frees HCA
> caps before continuing the existing cleanup sequence.
> 
> Fixes: b6b03097f982 ("net/mlx5: Initialize events outside devlink lock")
> Signed-off-by: Prathamesh Deshpande <prathameshdeshpande7@gmail.com>
> ---
>   drivers/net/ethernet/mellanox/mlx5/core/main.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
> index 3f73d9b1115d..fab80c79ff07 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
> @@ -1907,7 +1907,7 @@ int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
>   
>   	err = mlx5_notifiers_init(dev);
>   	if (err)
> -		goto err_hca_caps;
> +		goto err_notifiers_init;
>   
>   	/* The conjunction of sw_vhca_id with sw_owner_id will be a global
>   	 * unique id per function which uses mlx5_core.
> @@ -1923,6 +1923,8 @@ int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
>   
>   	return 0;
>   
> +err_notifiers_init:
> +	mlx5_hca_caps_free(dev);
>   err_hca_caps:
>   	mlx5_adev_cleanup(dev);
>   err_adev_init:

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