davinci_emac.c: Fix IFF_ALLMULTI setup

[ Upstream commit d69e0f7ea95fef8059251325a79c004bac01f018 ]

When IFF_ALLMULTI flag is set on interface and IFF_PROMISC isn't,
emac_dev_mcast_set should only enable RX of multicasts and reset
MACHASH registers.

It does this, but afterwards it either sets up multicast MACs
filtering or disables RX of multicasts and resets MACHASH registers
again, rendering IFF_ALLMULTI flag useless.

This patch fixes emac_dev_mcast_set, so that multicast MACs filtering and
disabling of RX of multicasts are skipped when IFF_ALLMULTI flag is set.

Tested with kernel 2.6.37.

Signed-off-by: Mariusz Ceier <mceier+kernel@gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index 860e15ddfbcbcd7232da1c71779793442d72a1c1..7233610164cd44844a7393455948cd6e3bddf4a1 100644 (file)
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -876,8 +876,7 @@ static void emac_dev_mcast_set(struct net_device *ndev)
                    netdev_mc_count(ndev) > EMAC_DEF_MAX_MULTICAST_ADDRESSES) {
                        mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST);
                        emac_add_mcast(priv, EMAC_ALL_MULTI_SET, NULL);
-               }
-               if (!netdev_mc_empty(ndev)) {
+               } else if (!netdev_mc_empty(ndev)) {
                        struct netdev_hw_addr *ha;
 
                        mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST);