linux-kernel - Re: [PATCH linux-next] staging: r8188eu: Use kzalloc() instead of kmalloc()+memset()

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Message-ID: <20210916134751.GJ2088@kadam>
Date:   Thu, 16 Sep 2021 16:47:51 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     CGEL <cgel.zte@...il.com>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Michael Straube <straube.linux@...il.com>,
        Martin Kaiser <martin@...ser.cx>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Changcheng Deng <deng.changcheng@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH linux-next] staging: r8188eu: Use kzalloc() instead of
 kmalloc()+memset()

On Thu, Sep 16, 2021 at 02:16:58AM +0000, CGEL wrote:
> From: Changcheng Deng <deng.changcheng@....com.cn>
> 
> This place can use kzalloc() directly instead of calling kmalloc() then
> memset(). Replace them.
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Changcheng Deng <deng.changcheng@....com.cn>
> ---
>  drivers/staging/r8188eu/os_dep/ioctl_linux.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
> index 92b8f2c..9c257c4 100644
> --- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
> +++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
> @@ -463,11 +463,10 @@ static int wpa_set_encryption(struct net_device *dev, struct ieee_param *param,
>  		if (wep_key_len > 0) {
>  			wep_key_len = wep_key_len <= 5 ? 5 : 13;
>  			wep_total_len = wep_key_len + FIELD_OFFSET(struct ndis_802_11_wep, KeyMaterial);
> -			pwep = kmalloc(wep_total_len, GFP_KERNEL);
> +			pwep = kzalloc(wep_total_len, GFP_KERNEL);
>  			if (!pwep)
>  				goto exit;

Missing error code as well.  It should be "ret = -ENOMEM;".

regards,
dan carpenter