Re: [PATCH net] net: bridge: mcast: don't delete permanent entries when fast leave is enabled

[David Miller <davem@xxxxxxxxxxxxx>]

From: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 30 Jul 2019 14:21:00 +0300

> diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
> index 3d8deac2353d..f8cac3702712 100644
> --- a/net/bridge/br_multicast.c
> +++ b/net/bridge/br_multicast.c
> @@ -1388,6 +1388,9 @@ br_multicast_leave_group(struct net_bridge *br,
>  			if (!br_port_group_equal(p, port, src))
>  				continue;
>  
> +			if (p->flags & MDB_PG_FLAGS_PERMANENT)
> +				break;
> +

Like David, I also don't understand why this can be a break.  Is it because
permanent entries are always the last on the list?  Why will there be no
other entries that might need to be processed on the list?