linux-kernel - Re: [PATCH linux-next] staging: r8188eu: use ARRAY

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Message-ID: <20210916124248.GI2088@kadam>
Date:   Thu, 16 Sep 2021 15:42:48 +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>,
        Nathan Chancellor <nathan@...nel.org>,
        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 ARRAY_SIZE

On Thu, Sep 16, 2021 at 01:59:36AM +0000, CGEL wrote:
> From: Changcheng Deng <deng.changcheng@....com.cn>
> 
> Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Changcheng Deng <deng.changcheng@....com.cn>
> ---
>  drivers/staging/r8188eu/os_dep/usb_intf.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/r8188eu/os_dep/usb_intf.c b/drivers/staging/r8188eu/os_dep/usb_intf.c
> index 78c857d..c7de8ee 100644
> --- a/drivers/staging/r8188eu/os_dep/usb_intf.c
> +++ b/drivers/staging/r8188eu/os_dep/usb_intf.c
> @@ -261,8 +261,7 @@ static void process_spec_devid(const struct usb_device_id *pdid)
>  	u16 vid, pid;
>  	u32 flags;
>  	int i;
> -	int num = sizeof(specific_device_id_tbl) /
> -		  sizeof(struct specific_device_id);
> +	int num = ARRAY_SIZE(specific_device_id_tbl);
>  
>  	for (i = 0; i < num; i++) {

Get rid of the "num" variable and use ARRAY_SIZE() directly.

regards,
dan carpenter