From 09717c28b76c30b1dc8c261c855ffb2406abab2e Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Mon, 3 Feb 2025 17:00:38 -0800 Subject: [PATCH] eth: fbnic: set IFF_UNICAST_FLT to avoid enabling promiscuous mode when adding unicast addrs I realized when we were adding unicast addresses we were enabling promiscuous mode. I did a bit of digging and realized we had overlooked setting the driver private flag to indicate we supported unicast filtering. Example below shows the table with 00deadbeef01 as the main NIC address, and 5 additional addresses in the 00deadbeefX0 format. # cat $dbgfs/mac_addr Idx S TCAM Bitmap Addr/Mask ---------------------------------- 00 0 00000000,00000000 000000000000 000000000000 01 0 00000000,00000000 000000000000 000000000000 02 0 00000000,00000000 000000000000 000000000000 ... 24 0 00000000,00000000 000000000000 000000000000 25 1 00100000,00000000 00deadbeef50 000000000000 26 1 00100000,00000000 00deadbeef40 000000000000 27 1 00100000,00000000 00deadbeef30 000000000000 28 1 00100000,00000000 00deadbeef20 000000000000 29 1 00100000,00000000 00deadbeef10 000000000000 30 1 00100000,00000000 00deadbeef01 000000000000 31 0 00000000,00000000 000000000000 000000000000 Before rule 31 would be active. With this change it correctly sticks to just the unicast filters. Signed-off-by: Alexander Duyck Signed-off-by: Jakub Kicinski Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250204010038.1404268-2-kuba@kernel.org Signed-off-by: Paolo Abeni --- drivers/net/ethernet/meta/fbnic/fbnic_netdev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c index 7a96b6ee773f3..1db57c42333ef 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c @@ -628,6 +628,8 @@ struct net_device *fbnic_netdev_alloc(struct fbnic_dev *fbd) fbnic_rss_key_fill(fbn->rss_key); fbnic_rss_init_en_mask(fbn); + netdev->priv_flags |= IFF_UNICAST_FLT; + netdev->features |= NETIF_F_RXHASH | NETIF_F_SG |