netdev - Re: [PATCH net-next 5/6] ethernet: renesas: remove unnecessary check

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Date:	Wed, 22 Oct 2014 15:47:43 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Varka Bhadram <varkabhadram@...il.com>, netdev@...r.kernel.org
CC:	Varka Bhadram <varkab@...c.in>
Subject: Re: [PATCH net-next 5/6] ethernet: renesas: remove unnecessary check

On 10/22/2014 8:16 AM, Varka Bhadram wrote:

> devm_ioremap_resource checks platform_get_resource() return value.
> We can remove the duplicate check here.

> Signed-off-by: Varka Bhadram <varkab@...c.in>
> ---
>   drivers/net/ethernet/renesas/sh_eth.c |    4 ----
>   1 file changed, 4 deletions(-)

> diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
> index 60e9c2c..d824ba5 100644
> --- a/drivers/net/ethernet/renesas/sh_eth.c
> +++ b/drivers/net/ethernet/renesas/sh_eth.c
> @@ -2769,10 +2769,6 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
>
>   	/* get base addr */
>   	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (unlikely(res == NULL)) {
> -		dev_err(&pdev->dev, "invalid resource\n");
> -		return -EINVAL;
> -	}

    The driver dereferences 'res' further on, so you can't remove this check.

WBR, Sergei

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