diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index cb5f36e497e916359a5af8a982dbc6b3f448e166..4576d59a98a2b792a9e6a50cd03344aa55f0b01f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -449,16 +449,39 @@ static int mlxsw_sp_port_set_mac_address(struct net_device *dev, void *p)
 	return 0;
 }
 
+static int mlxsw_sp_port_headroom_set(struct mlxsw_sp_port *mlxsw_sp_port,
+				      int mtu)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	u16 pg_size = 2 * MLXSW_SP_BYTES_TO_CELLS(mtu);
+	char pbmc_pl[MLXSW_REG_PBMC_LEN];
+	int err;
+
+	mlxsw_reg_pbmc_pack(pbmc_pl, mlxsw_sp_port->local_port, 0, 0);
+	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(pbmc), pbmc_pl);
+	if (err)
+		return err;
+	mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl, 0, pg_size);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pbmc), pbmc_pl);
+}
+
 static int mlxsw_sp_port_change_mtu(struct net_device *dev, int mtu)
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
 	int err;
 
-	err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu);
+	err = mlxsw_sp_port_headroom_set(mlxsw_sp_port, mtu);
 	if (err)
 		return err;
+	err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu);
+	if (err)
+		goto err_port_mtu_set;
 	dev->mtu = mtu;
 	return 0;
+
+err_port_mtu_set:
+	mlxsw_sp_port_headroom_set(mlxsw_sp_port, dev->mtu);
+	return err;
 }
 
 static struct rtnl_link_stats64 *
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
index dadb6e1ccf827a4285fabf64587b9907bc3c043d..e7a5b73188f1b446d304dd92d00d9dd30f84661f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
@@ -35,6 +35,7 @@
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/dcbnl.h>
+#include <linux/if_ether.h>
 
 #include "spectrum.h"
 #include "core.h"
@@ -53,15 +54,15 @@ struct mlxsw_sp_pb {
 	}
 
 static const struct mlxsw_sp_pb mlxsw_sp_pbs[] = {
-	MLXSW_SP_PB(0, 208),
-	MLXSW_SP_PB(1, 208),
-	MLXSW_SP_PB(2, 208),
-	MLXSW_SP_PB(3, 208),
-	MLXSW_SP_PB(4, 208),
-	MLXSW_SP_PB(5, 208),
-	MLXSW_SP_PB(6, 208),
-	MLXSW_SP_PB(7, 208),
-	MLXSW_SP_PB(9, 208),
+	MLXSW_SP_PB(0, 2 * MLXSW_SP_BYTES_TO_CELLS(ETH_FRAME_LEN)),
+	MLXSW_SP_PB(1, 0),
+	MLXSW_SP_PB(2, 0),
+	MLXSW_SP_PB(3, 0),
+	MLXSW_SP_PB(4, 0),
+	MLXSW_SP_PB(5, 0),
+	MLXSW_SP_PB(6, 0),
+	MLXSW_SP_PB(7, 0),
+	MLXSW_SP_PB(9, 2 * MLXSW_SP_BYTES_TO_CELLS(MLXSW_PORT_MAX_MTU)),
 };
 
 #define MLXSW_SP_PBS_LEN ARRAY_SIZE(mlxsw_sp_pbs)