linux-kernel - Re: [PATCH] nvmem: delete unneeded IS_ERR test

Open Source and information security mailing list archives

Message-ID: <567610BE.8010706@gmail.com>
Date:	Sun, 20 Dec 2015 10:21:50 +0800
From:	Caesar Wang <caesar.upstream@...il.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
CC:	Heiko Stuebner <heiko@...ech.de>, kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] nvmem: delete unneeded IS_ERR test

Hi Julia,

Thanks to check this, but there was a patch fixing it.:-)

在 2015年12月20日 05:19, Julia Lawall 写道:
> devm_kzalloc returns NULL rather than an ERR_PTR value.
>
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @@
> expression x,e;
> @@
>
> * x = devm_kzalloc(...)
> ... when != x = e
> * IS_ERR(x)
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
>
> ---
>   drivers/nvmem/rockchip-efuse.c |    4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/nvmem/rockchip-efuse.c b/drivers/nvmem/rockchip-efuse.c
> index f552134..811c73c 100644
> --- a/drivers/nvmem/rockchip-efuse.c
> +++ b/drivers/nvmem/rockchip-efuse.c
> @@ -136,8 +136,8 @@ static int rockchip_efuse_probe(struct platform_device *pdev)
>   
>   	context = devm_kzalloc(dev, sizeof(struct rockchip_efuse_context),
>   			       GFP_KERNEL);
> -	if (IS_ERR(context))
> -		return PTR_ERR(context);
> +	if (!context)
> +		return -ENOMEM;

Fixed in this patch[0].

patch[0]:
https://patchwork.kernel.org/patch/7842821/

Thanks,
Caesar
>   
>   	clk = devm_clk_get(dev, "pclk_efuse");
>   	if (IS_ERR(clk))
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip

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