From: Sergei Shtylyov <sergei.shtylyov@cogentembedded•com>
To: Varka Bhadram <varkabhadram@gmail•com>, netdev@vger•kernel.org
Cc: Varka Bhadram <varkab@cdac•in>
Subject: Re: [PATCH net-next 1/6] ethernet: wiznet: remove unnecessary check
Date: Wed, 22 Oct 2014 15:43:50 +0400 [thread overview]
Message-ID: <54479876.5050202@cogentembedded.com> (raw)
In-Reply-To: <1413951386-29645-2-git-send-email-varkab@cdac.in>
Hello.
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@cdac•in>
> ---
> drivers/net/ethernet/wiznet/w5100.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
> diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c
> index 0f56b1c..bf195e3 100644
> --- a/drivers/net/ethernet/wiznet/w5100.c
> +++ b/drivers/net/ethernet/wiznet/w5100.c
> @@ -638,8 +638,7 @@ static int w5100_hw_probe(struct platform_device *pdev)
> }
>
> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!mem)
> - return -ENXIO;
> +
> mem_size = resource_size(mem);
This would cause a NULL dereference on resource_size() call if 'mem' is
NULL. You can't remove the NULL check because of that.
>
> priv->base = devm_ioremap_resource(&pdev->dev, mem);
>
WBR, Sergei
next prev parent reply other threads:[~2014-10-22 11:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <N>
2014-10-22 4:16 ` [PATCH net-next 0/6] cleanup on resource check Varka Bhadram
2014-10-22 4:16 ` [PATCH net-next 1/6] ethernet: wiznet: remove unnecessary check Varka Bhadram
2014-10-22 11:43 ` Sergei Shtylyov [this message]
2014-10-22 12:23 ` Varka Bhadram
2014-10-22 4:16 ` [PATCH net-next 2/6] " Varka Bhadram
2014-10-22 11:44 ` Sergei Shtylyov
2014-10-22 12:24 ` Varka Bhadram
2014-10-22 4:16 ` [PATCH net-next 3/6] ethernet: apm: xgene: " Varka Bhadram
2014-10-22 4:16 ` [PATCH net-next 4/6] ethernet: marvell: " Varka Bhadram
2014-10-22 4:16 ` [PATCH net-next 5/6] ethernet: renesas: " Varka Bhadram
2014-10-22 11:47 ` Sergei Shtylyov
2014-10-22 12:22 ` Varka Bhadram
2014-10-22 4:16 ` [PATCH net-next 6/6] ethernet: samsung: sxgbe: " Varka Bhadram
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