From 65b6625069a42edf2a813dd1c50604c6c6236fe5 Mon Sep 17 00:00:00 2001
From: Steen Hegelund <steen.hegelund@microchip.com>
Date: Tue, 14 Feb 2023 11:40:40 +0100
Subject: [PATCH] net: microchip: sparx5: Discard frames with SMAC multicast
addresses
A valid frame should never use a multicast address as its source MAC
address, so discard these invalid frames.
Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
drivers/net/ethernet/microchip/sparx5/sparx5_port.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_port.c b/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
index 246259b2ae94c..3a1b1a1f5a195 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
@@ -1071,6 +1071,11 @@ int sparx5_port_init(struct sparx5 *sparx5,
/* Discard pause frame 01-80-C2-00-00-01 */
spx5_wr(PAUSE_DISCARD, sparx5, ANA_CL_CAPTURE_BPDU_CFG(port->portno));
+ /* Discard SMAC multicast */
+ spx5_rmw(ANA_CL_FILTER_CTRL_FILTER_SMAC_MC_DIS_SET(0),
+ ANA_CL_FILTER_CTRL_FILTER_SMAC_MC_DIS,
+ sparx5, ANA_CL_FILTER_CTRL(port->portno));
+
if (conf->portmode == PHY_INTERFACE_MODE_QSGMII ||
conf->portmode == PHY_INTERFACE_MODE_SGMII) {
err = sparx5_serdes_set(sparx5, port, conf);
--
2.30.2