netdev - Re: [PATCH net-next] net/mlx4: remove many unnecessary NULL values

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Date: Tue, 1 Aug 2023 17:40:01 +0200
From: Simon Horman <horms@...nel.org>
To: Ruan Jinjie <ruanjinjie@...wei.com>
Cc: tariqt@...dia.com, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net/mlx4: remove many unnecessary NULL values

On Tue, Aug 01, 2023 at 08:34:22PM +0800, Ruan Jinjie wrote:
> Ther are many pointers assigned first, which need not to be initialized, so
> remove the NULL assignment.

How about something like:

Don't initialise local variables to NULL which are always
set to other values elsewhere in the same function.

> Signed-off-by: Ruan Jinjie <ruanjinjie@...wei.com>

...

> diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c

...

> @@ -2294,8 +2294,8 @@ static int mlx4_init_fw(struct mlx4_dev *dev)
>  static int mlx4_init_hca(struct mlx4_dev *dev)
>  {
>  	struct mlx4_priv	  *priv = mlx4_priv(dev);
> -	struct mlx4_init_hca_param *init_hca = NULL;
> -	struct mlx4_dev_cap	  *dev_cap = NULL;
> +	struct mlx4_init_hca_param *init_hca;
> +	struct mlx4_dev_cap	  *dev_cap;
>  	struct mlx4_adapter	   adapter;
>  	struct mlx4_profile	   profile;
>  	u64 icm_size;

This last hunk doesn't seem correct, as it doesn't
seem these aren't always initialised elsewhere in the function
before being passed to kfree().

> -- 
> 2.34.1
> 
>