linux-kernel - Re: [PATCH v2] net/mlx5: DR, Fix uninitialized var warning

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Message-ID: <613ca9c7-399b-08ac-8333-907128511e80@nvidia.com>
Date:   Thu, 10 Nov 2022 16:43:53 +0200
From:   Roi Dayan <roid@...dia.com>
To:     YueHaibing <yuehaibing@...wei.com>, saeedm@...dia.com,
        leon@...nel.org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, kliteyn@...dia.com,
        mbloch@...dia.com, erezsh@...lanox.com, valex@...dia.com
Cc:     netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net/mlx5: DR, Fix uninitialized var warning



On 10/11/2022 15:47, YueHaibing wrote:
> Smatch warns this:
> 
> drivers/net/ethernet/mellanox/mlx5/core/steering/dr_table.c:81
>  mlx5dr_table_set_miss_action() error: uninitialized symbol 'ret'.
> 
> Initializing ret with -EOPNOTSUPP and fix missing action case.
> 
> Fixes: 7838e1725394 ("net/mlx5: DR, Expose steering table functionality")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
> v2: init ret to -EOPNOTSUPP
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/steering/dr_table.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_table.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_table.c
> index eb81759244d5..7cc4cb7fa392 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_table.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_table.c
> @@ -46,7 +46,7 @@ static int dr_table_set_miss_action_nic(struct mlx5dr_domain *dmn,
>  int mlx5dr_table_set_miss_action(struct mlx5dr_table *tbl,
>  				 struct mlx5dr_action *action)
>  {
> -	int ret;
> +	int ret = -EOPNOTSUPP;
>  
>  	if (action && action->action_type != DR_ACTION_TYP_FT)
>  		return -EOPNOTSUPP;
> @@ -67,6 +67,9 @@ int mlx5dr_table_set_miss_action(struct mlx5dr_table *tbl,
>  			goto out;
>  	}
>  
> +	if (ret)
> +		goto out;
> +
>  	/* Release old action */
>  	if (tbl->miss_action)
>  		refcount_dec(&tbl->miss_action->refcount);

thanks

Reviewed-by: Roi Dayan <roid@...dia.com>