netdev - Re: [PATCH] wl1251: check return from call to wl1251_acx_arp_ip

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Message-ID: <20171226181733.GA20068@amd>
Date:   Tue, 26 Dec 2017 19:17:33 +0100
From:   Pavel Machek <pavel@....cz>
To:     Colin King <colin.king@...onical.com>
Cc:     Kalle Valo <kvalo@...eaurora.org>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Johannes Berg <johannes.berg@...el.com>,
        "David S . Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] wl1251: check return from call to
 wl1251_acx_arp_ip_filter

On Tue 2017-12-26 17:33:18, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently the less than zero error check on ret is incorrect
> as it is checking a far earlier ret assignment rather than the
> return from the call to wl1251_acx_arp_ip_filter. Fix this by
> adding in the missing assginment.
> 
> Detected by CoverityScan, CID#1164835 ("Logically dead code")
> 
> Fixes: 204cc5c44fb6 ("wl1251: implement hardware ARP filtering")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Hmm. So yes, it might be correct. OTOH, this change may also break
something. So... how was it tested?

								Pavel

> ---
>  drivers/net/wireless/ti/wl1251/main.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/wireless/ti/wl1251/main.c b/drivers/net/wireless/ti/wl1251/main.c
> index 6d02c660b4ab..037defd10b91 100644
> --- a/drivers/net/wireless/ti/wl1251/main.c
> +++ b/drivers/net/wireless/ti/wl1251/main.c
> @@ -1200,8 +1200,7 @@ static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
>  		WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
>  
>  		enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
> -		wl1251_acx_arp_ip_filter(wl, enable, addr);
> -
> +		ret = wl1251_acx_arp_ip_filter(wl, enable, addr);
>  		if (ret < 0)
>  			goto out_sleep;
>  	}

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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