linux-kernel - Re: [PATCH] staging: r8188eu: os_dep: use kmemdup instead of kzalloc and memcpy

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Date:   Fri, 3 Sep 2021 19:53:29 +0100
From:   Phillip Potter <phil@...lpotter.co.uk>
To:     Saurav Girepunje <saurav.girepunje@...il.com>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Greg KH <gregkh@...uxfoundation.org>,
        Michael Straube <straube.linux@...il.com>,
        Martin Kaiser <martin@...ser.cx>,
        "open list:STAGING SUBSYSTEM" <linux-staging@...ts.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        saurav.girepunje@...mail.com
Subject: Re: [PATCH] staging: r8188eu: os_dep: use kmemdup instead of kzalloc
 and memcpy

On Fri, 3 Sept 2021 at 18:56, Saurav Girepunje
<saurav.girepunje@...il.com> wrote:
>
> Fixes coccicheck warning:WARNING opportunity for kmemdup in ioctl_linux.c
>
> Signed-off-by: Saurav Girepunje <saurav.girepunje@...il.com>
> ---
>  drivers/staging/r8188eu/os_dep/ioctl_linux.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
> index 81d4255d1785..495fadd2b8c8 100644
> --- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
> +++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
> @@ -585,14 +585,12 @@ static int rtw_set_wpa_ie(struct adapter *padapter, char *pie, unsigned short ie
>         }
>
>         if (ielen) {
> -               buf = kzalloc(ielen, GFP_KERNEL);
> +               buf = kmemdup(pie, ielen, GFP_KERNEL);
>                 if (!buf) {
>                         ret =  -ENOMEM;
>                         goto exit;
>                 }
>
> -               memcpy(buf, pie, ielen);
> -
>                 /* dump */
>                 {
>                         int i;
> --
> 2.32.0
>

Dear Saurav,

Looks good, thanks:
Acked-by: Phillip Potter <phil@...lpotter.co.uk>

Regards,
Phil