4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Stephen Hemminger <[email protected]> [ Upstream commit f03dbb06dc380274e351ca4b1ee1587ed4529e62 ] My recent change to netvsc drive in how receive flags are handled broke multicast. The Hyper-v/Azure virtual interface there is not a multicast filter list, filtering is only all or none. The driver must enable all multicast if any multicast address is present. Fixes: 009f766ca238 ("hv_netvsc: filter multicast/broadcast") Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/hyperv/rndis_filter.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -856,7 +856,7 @@ static void rndis_set_multicast(struct w if (flags & IFF_PROMISC) { filter = NDIS_PACKET_TYPE_PROMISCUOUS; } else { - if (flags & IFF_ALLMULTI) + if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI)) filter |= NDIS_PACKET_TYPE_ALL_MULTICAST; if (flags & IFF_BROADCAST) filter |= NDIS_PACKET_TYPE_BROADCAST;
