This is a note to let you know that I've just added the patch titled

mvpp2: fix multicast address filter

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: mvpp2-fix-multicast-address-filter.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 7ac8ff95f48cbfa609a060fd6a1e361dd62feeb3 Mon Sep 17 00:00:00 2001

From: Mikulas Patocka mpatocka@redhat.com Date: Sun, 11 Feb 2018 18:10:28 -0500 Subject: mvpp2: fix multicast address filter

From: Mikulas Patocka mpatocka@redhat.com

commit 7ac8ff95f48cbfa609a060fd6a1e361dd62feeb3 upstream.

IPv6 doesn't work on the MacchiatoBIN board. It is caused by broken multicast address filter in the mvpp2 driver.

The driver loads doesn't load any multicast entries if "allmulti" is not set. This condition should be reversed.

The condition !netdev_mc_empty(dev) is useless (because netdev_for_each_mc_addr is nop if the list is empty).

This patch also fixes a possible overflow of the multicast list - if mvpp2_prs_mac_da_accept fails, we set the allmulti flag and retry.

Signed-off-by: Mikulas Patocka mpatocka@redhat.com Cc: stable@vger.kernel.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/net/ethernet/marvell/mvpp2.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/marvell/mvpp2.c +++ b/drivers/net/ethernet/marvell/mvpp2.c @@ -7127,6 +7127,7 @@ static void mvpp2_set_rx_mode(struct net int id = port->id; bool allmulti = dev->flags & IFF_ALLMULTI;

+retry: mvpp2_prs_mac_promisc_set(priv, id, dev->flags & IFF_PROMISC); mvpp2_prs_mac_multi_set(priv, id, MVPP2_PE_MAC_MC_ALL, allmulti); mvpp2_prs_mac_multi_set(priv, id, MVPP2_PE_MAC_MC_IP6, allmulti); @@ -7134,9 +7135,13 @@ static void mvpp2_set_rx_mode(struct net /* Remove all port->id's mcast enries */ mvpp2_prs_mcast_del_all(priv, id);

- if (allmulti && !netdev_mc_empty(dev)) { - netdev_for_each_mc_addr(ha, dev) - mvpp2_prs_mac_da_accept(priv, id, ha->addr, true); + if (!allmulti) { + netdev_for_each_mc_addr(ha, dev) { + if (mvpp2_prs_mac_da_accept(priv, id, ha->addr, true)) { + allmulti = true; + goto retry; + } + } } }

Patches currently in stable-queue which might be from mpatocka@redhat.com are

queue-4.15/mvpp2-fix-multicast-address-filter.patch queue-4.15/blk-wbt-account-flush-requests-correctly.patch