From: Stephen Hemminger Date: Tue, 27 Mar 2018 18:28:48 +0000 (-0700) Subject: hv_netvsc: enable multicast if necessary X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f03dbb06dc380274e351ca4b1ee1587ed4529e62;p=linux.git hv_netvsc: enable multicast if necessary 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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index a6ec41c399d6c..465c42e305084 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -858,7 +858,7 @@ static void rndis_set_multicast(struct work_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;