net: bridge: mcast: don't ignore return value of __grp_src_toex_excl

When we're handling TO_EXCLUDE report in EXCLUDE filter mode we should
not ignore the return value of __grp_src_toex_excl() as we'll miss
sending notifications about group changes.

Fixes: 5bf1e00b ("net: bridge: mcast: support for IGMPV3/MLDv2 CHANGE_TO_INCLUDE/EXCLUDE report")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_multicast.c

@@ -1710,7 +1710,7 @@ static bool br_multicast_toex(struct net_bridge_port_group *pg,
 		changed = true;
 		break;
 	case MCAST_EXCLUDE:
-		__grp_src_toex_excl(pg, srcs, nsrcs, src_size);
+		changed = __grp_src_toex_excl(pg, srcs, nsrcs, src_size);
 		break;
 	}