netdev - RE: [PATCH 4/4] drivers/net/wireless/mwifiex/scan.c: test the just-initialized value

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Date:	Mon, 22 Aug 2011 12:02:22 -0700
From:	Bing Zhao <bzhao@...vell.com>
To:	Julia Lawall <julia@...u.dk>,
	Pierre Louis Aublin <pierre-louis.aublin@...ia.fr>
CC:	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
	"John W. Linville" <linville@...driver.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 4/4] drivers/net/wireless/mwifiex/scan.c: test the
 just-initialized value

Hi Julia,

Thanks for the patch.

> -----Original Message-----
> From: Julia Lawall [mailto:julia@...u.dk]
> Sent: Monday, August 22, 2011 7:16 AM
> To: Pierre Louis Aublin
> Cc: Bing Zhao; kernel-janitors@...r.kernel.org; John W. Linville; linux-wireless@...r.kernel.org;
> netdev@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [PATCH 4/4] drivers/net/wireless/mwifiex/scan.c: test the just-initialized value
> 
> From: Julia Lawall <julia@...u.dk>
> 
> Test the just-initialized value rather than some other one.
> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @r@
> identifier x,y,f!={PTR_ERR,ERR_PTR,ERR_CAST};
> statement S;
> @@
> 
> x = f(...);
> (
> if (\(x == NULL\|IS_ERR(x)\)) S
> |
> *if (\(y == NULL\|IS_ERR(y)\))
>  { ... when != x
>    return ...; }
> )
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@...u.dk>

Acked-by: Bing Zhao <bzhao@...vell.com>


Thanks,
Bing

> 
> ---
>  drivers/net/wireless/mwifiex/scan.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c
> index b28241c..37ca2f9 100644
> --- a/drivers/net/wireless/mwifiex/scan.c
> +++ b/drivers/net/wireless/mwifiex/scan.c
> @@ -1480,8 +1480,8 @@ mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
>  		return -ENOMEM;
>  	}
>  	beacon_ie = kzalloc(ie_len, GFP_KERNEL);
> -	if (!bss_desc) {
> -		dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
> +	if (!beacon_ie) {
> +		dev_err(priv->adapter->dev, " failed to alloc beacon_ie\n");
>  		return -ENOMEM;
>  	}
>  	memcpy(beacon_ie, ie_buf, ie_len);
--
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