[PATCH 2/2] net: arc_emac: don't pass multicast packets to kernel in non-multicast mode

[Alexander Kochetkov]

The patch disable capturing multicast packets when multicast mode
disabled for ethernet ('ifconfig eth0 -multicast'). In that case
no multicast packet will be passed to kernel.
---
 drivers/net/ethernet/arc/emac_main.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/arc/emac_main.c 
b/drivers/net/ethernet/arc/emac_main.c
index 2e4ee86..30ad833 100644
--- a/drivers/net/ethernet/arc/emac_main.c
+++ b/drivers/net/ethernet/arc/emac_main.c
@@ -460,7 +460,7 @@ static void arc_emac_set_rx_mode(struct net_device *ndev)
                if (ndev->flags & IFF_ALLMULTI) {
                        arc_reg_set(priv, R_LAFL, ~0);
                        arc_reg_set(priv, R_LAFH, ~0);
-               } else {
+               } else if (ndev->flags & IFF_MULTICAST) {
                        struct netdev_hw_addr *ha;
                        unsigned int filter[2] = { 0, 0 };
                        int bit;
@@ -469,9 +469,11 @@ static void arc_emac_set_rx_mode(struct net_device *ndev)
                                bit = ether_crc_le(ETH_ALEN, ha->addr) >> 26;
                                filter[bit >> 5] |= 1 << (bit & 31);
                        }
-
                        arc_reg_set(priv, R_LAFL, filter[0]);
                        arc_reg_set(priv, R_LAFH, filter[1]);
+               } else {
+                       arc_reg_set(priv, R_LAFL, 0);
+                       arc_reg_set(priv, R_LAFH, 0);
                }
        }
 }
-- 
1.7.9.5