net: introduce IFF_UNICAST_FLT private flag

Use IFF_UNICAST_FTL to find out if driver handles unicast address
filtering. In case it does not, promisc mode is entered.

Patch also fixes following drivers:
stmmac, niu: support uc filtering and yet it propagated
	ndo_set_multicast_list
bna, benet, pxa168_eth, ks8851, ks8851_mll, ksz884x : has set
	ndo_set_rx_mode but do not support uc filtering

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 6 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index a8d91a5dd909..6eb03fdaf075 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4522,9 +4522,7 @@ void __dev_set_rx_mode(struct net_device *dev)
         if (!netif_device_present(dev))
                 return;
 
-        if (ops->ndo_set_rx_mode)
-                ops->ndo_set_rx_mode(dev);
-        else {
+        if (!(dev->priv_flags & IFF_UNICAST_FLT)) {
                 /* Unicast addresses changes may only happen under the rtnl,
                  * therefore calling __dev_set_promiscuity here is safe.
                  */
@@ -4535,10 +4533,12 @@ void __dev_set_rx_mode(struct net_device *dev)
                         __dev_set_promiscuity(dev, -1);
                         dev->uc_promisc = false;
                 }
-
-                if (ops->ndo_set_multicast_list)
-                        ops->ndo_set_multicast_list(dev);
         }
+
+        if (ops->ndo_set_rx_mode)
+                ops->ndo_set_rx_mode(dev);
+        else if (ops->ndo_set_multicast_list)
+                ops->ndo_set_multicast_list(dev);
 }
 
 void dev_set_rx_mode(struct net_device *dev)