netdev - Re: [PATCH net-next] bridge: mcast: Default back to multicast enabled state

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Date:   Mon, 1 Oct 2018 12:07:57 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     Ido Schimmel <idosch@...lanox.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, roopa@...ulusnetworks.com,
        bridge@...ts.linux-foundation.org, mlxsw@...lanox.com
Subject: Re: [PATCH net-next] bridge: mcast: Default back to multicast enabled
 state

On 01/10/2018 11:57, Ido Schimmel wrote:
> Commit 13cefad2f2c1 ("net: bridge: convert and rename mcast disabled")
> converted the 'multicast_disabled' field to an option bit named
> 'BROPT_MULTICAST_ENABLED'.
> 
> While the old field was implicitly initialized to 0, the new field is
> not initialized, resulting in the bridge defaulting to multicast
> disabled state and breaking existing applications.
> 
> Fix this by explicitly initializing the option.
> 
> Fixes: 13cefad2f2c1 ("net: bridge: convert and rename mcast disabled")
> Signed-off-by: Ido Schimmel <idosch@...lanox.com>
> ---
>  net/bridge/br_multicast.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
> index 928024d8360d..024139b51d3a 100644
> --- a/net/bridge/br_multicast.c
> +++ b/net/bridge/br_multicast.c
> @@ -1976,6 +1976,7 @@ void br_multicast_init(struct net_bridge *br)
>  	br->ip6_other_query.delay_time = 0;
>  	br->ip6_querier.port = NULL;
>  #endif
> +	br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
>  	br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
>  
>  	spin_lock_init(&br->multicast_lock);
> 

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