linux-kernel - Re: [PATCH 4/4] Staging: rtl8712: ieee80211:fixed warning line over 80 characters coding style issue

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Date:   Mon, 08 May 2017 15:35:01 -0700
From:   Joe Perches <joe@...ches.com>
To:     Jaya Durga <jayad@...c.in>, gregkh@...uxfoundation.org
Cc:     Larry.Finger@...inger.net, florian.c.schilhabel@...glemail.com,
        driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] Staging: rtl8712: ieee80211:fixed warning line
 over 80 characters coding style issue

On Tue, 2017-05-09 at 00:52 +0530, Jaya Durga wrote:
> fixed warning line over 80 characters coding style issue
> 
> Signed-off-by: Jaya Durga <jayad@...c.in>
> ---
>  drivers/staging/rtl8712/ieee80211.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/rtl8712/ieee80211.c b/drivers/staging/rtl8712/ieee80211.c
> index 42cb46c..a7152df 100644
> --- a/drivers/staging/rtl8712/ieee80211.c
> +++ b/drivers/staging/rtl8712/ieee80211.c
> @@ -222,7 +222,9 @@ unsigned char *r8712_get_wpa_ie(unsigned char *pie, int *wpa_ie_len, int limit)
>  		pbuf = r8712_get_ie(pbuf, _WPA_IE_ID_, &len, limit);
>  		if (pbuf) {
>  			/*check if oui matches...*/
> -			if (memcmp((pbuf + 2), wpa_oui_type, sizeof(wpa_oui_type)))
> +			if (memcmp(
> +				(pbuf + 2), wpa_oui_type,
> +				sizeof(wpa_oui_type)))
>  				goto check_next_ie;
>  			/*check version...*/
>  			memcpy((u8 *)&val16, (pbuf + 6), sizeof(val16));

This is a oddly written function.
Perhaps something like this would be more obvious:

unsigned char *r8712_get_wpa_ie(unsigned char *pie, int *wpa_ie_len, int limit)
{
	u8 *pbuf = pie;

	while (1) {
		int len;

		pbuf = r8712_get_ie(pbuf, _WPA_IE_ID_, &len, limit);
		if (!pbuf)
			break;
		/* check if oui matches... */
		if (memcmp(pbuf + 2, WPA_OUI_TYPE, sizeof(WPA_OUI_TYPE)) == 0 &&
		    get_unaligned_le16(pbuf + 6) == 0x0001) {
			*wpa_ie_len = *(pbuf + 1);
			return pbuf;
		}
		limit = limit - (pbuf - pie) - 2 - len;
		if (limit <= 0)
			break;
		pbuf += 2 + len;
	}

	*wpa_ie_len = 0;
	return NULL;
}