[3.8.y.z extended stable] Patch "davinci_emac.c: Fix IFF_ALLMULTI setup" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Fri Nov 1 21:43:44 UTC 2013

This is a note to let you know that I have just added a patch titled

    davinci_emac.c: Fix IFF_ALLMULTI setup

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:


This patch is scheduled to be released in version

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see



>From 06683e44d447f02e86a1bb9bfadc339003df339f Mon Sep 17 00:00:00 2001
From: Mariusz Ceier <mceier+kernel at gmail.com>
Date: Mon, 21 Oct 2013 19:45:04 +0200
Subject: 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 at gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm at ti.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
 drivers/net/ethernet/ti/davinci_emac.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index 4ebcb24..17a3028 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -878,8 +878,7 @@ 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);

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