Re: [PATCH net-next v2 03/14] net: bridge: mcast: avoid sleeping on bridge-down

[Ido Schimmel]

On Fri, Feb 06, 2026 at 03:52:09AM +0100, Linus Lüssing wrote:
> diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
> index a818fdc22da9..d9d1227d5708 100644
> --- a/net/bridge/br_device.c
> +++ b/net/bridge/br_device.c
> @@ -168,7 +168,9 @@ static int br_dev_open(struct net_device *dev)
>       netdev_update_features(dev);
>       netif_start_queue(dev);
>       br_stp_enable_bridge(br);
> +     spin_lock_bh(&br->multicast_lock);

This wouldn't work when CONFIG_BRIDGE_IGMP_SNOOPING is not set

>       br_multicast_open(br);
> +     spin_unlock_bh(&br->multicast_lock);
>  
>       if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
>               br_multicast_join_snoopers(br);