linux-kernel - Re: [PATCH][next] net: bridge: Fix missing return assignment from br_vlan_replay

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Date:   Wed, 24 Mar 2021 20:50:43 +0200
From:   Nikolay Aleksandrov <nikolay@...dia.com>
To:     Colin King <colin.king@...onical.com>,
        Roopa Prabhu <roopa@...dia.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Vladimir Oltean <vladimir.oltean@....com>,
        bridge@...ts.linux-foundation.org, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] net: bridge: Fix missing return assignment from
 br_vlan_replay_one call

On 24/03/2021 17:09, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The call to br_vlan_replay_one is returning an error return value but
> this is not being assigned to err and the following check on err is
> currently always false because err was initialized to zero. Fix this
> by assigning err.
> 
> Addresses-Coverity: ("'Constant' variable guards dead code")
> Fixes: 22f67cdfae6a ("net: bridge: add helper to replay VLANs installed on port")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  net/bridge/br_vlan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
> index ca8daccff217..7422691230b1 100644
> --- a/net/bridge/br_vlan.c
> +++ b/net/bridge/br_vlan.c
> @@ -1815,7 +1815,7 @@ int br_vlan_replay(struct net_device *br_dev, struct net_device *dev,
>  		if (!br_vlan_should_use(v))
>  			continue;
>  
> -		br_vlan_replay_one(nb, dev, &vlan, extack);
> +		err = br_vlan_replay_one(nb, dev, &vlan, extack);
>  		if (err)
>  			return err;
>  	}
> 

Thanks,
Acked-by: Nikolay Aleksandrov <nikolay@...dia.com>