hv_netvsc: filter multicast/broadcast

The netvsc driver was always enabling all multicast and broadcast
even if netdevice flag had not enabled it.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 8 deletions

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 1cba767c6453..8927c483c217 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -854,15 +854,19 @@ static void rndis_set_multicast(struct work_struct *w)
 {
         struct rndis_device *rdev
                 = container_of(w, struct rndis_device, mcast_work);
+        u32 filter = NDIS_PACKET_TYPE_DIRECTED;
+        unsigned int flags = rdev->ndev->flags;
 
-        if (rdev->ndev->flags & IFF_PROMISC)
-                rndis_filter_set_packet_filter(rdev,
-                                               NDIS_PACKET_TYPE_PROMISCUOUS);
-        else
-                rndis_filter_set_packet_filter(rdev,
-                                               NDIS_PACKET_TYPE_BROADCAST |
-                                               NDIS_PACKET_TYPE_ALL_MULTICAST |
-                                               NDIS_PACKET_TYPE_DIRECTED);
+        if (flags & IFF_PROMISC) {
+                filter = NDIS_PACKET_TYPE_PROMISCUOUS;
+        } else {
+                if (flags & IFF_ALLMULTI)
+                        flags |= NDIS_PACKET_TYPE_ALL_MULTICAST;
+                if (flags & IFF_BROADCAST)
+                        flags |= NDIS_PACKET_TYPE_BROADCAST;
+        }
+
+        rndis_filter_set_packet_filter(rdev, filter);
 }
 
 void rndis_filter_update(struct netvsc_device *nvdev)