From 30d8938384c75e1aad8addf55cb8d152d9d3a135 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Mon, 6 May 2019 00:25:06 +0200 Subject: net: dsa: lantiq: Allow special tags only on CPU port Allow the special tag in ingress only on the CPU port and not on all ports. A packet with a special tag could circumvent the hardware forwarding and should only be allowed on the CPU port where Linux controls the port. Fixes: 14fceff4771e ("net: dsa: Add Lantiq / Intel DSA driver for vrx200)" Signed-off-by: Hauke Mehrtens Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/dsa/lantiq_gswip.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/net/dsa/lantiq_gswip.c') diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c index d8328866908c..0a2259cb09df 100644 --- a/drivers/net/dsa/lantiq_gswip.c +++ b/drivers/net/dsa/lantiq_gswip.c @@ -461,8 +461,6 @@ static int gswip_port_enable(struct dsa_switch *ds, int port, GSWIP_FDMA_PCTRLp(port)); gswip_switch_mask(priv, 0, GSWIP_SDMA_PCTRL_EN, GSWIP_SDMA_PCTRLp(port)); - gswip_switch_mask(priv, 0, GSWIP_PCE_PCTRL_0_INGRESS, - GSWIP_PCE_PCTRL_0p(port)); if (!dsa_is_cpu_port(ds, port)) { u32 macconf = GSWIP_MDIO_PHY_LINK_AUTO | @@ -578,6 +576,10 @@ static int gswip_setup(struct dsa_switch *ds) gswip_switch_mask(priv, 0, GSWIP_FDMA_PCTRL_STEN, GSWIP_FDMA_PCTRLp(cpu_port)); + /* accept special tag in ingress direction */ + gswip_switch_mask(priv, 0, GSWIP_PCE_PCTRL_0_INGRESS, + GSWIP_PCE_PCTRL_0p(cpu_port)); + gswip_switch_mask(priv, 0, GSWIP_MAC_CTRL_2_MLEN, GSWIP_MAC_CTRL_2p(cpu_port)); gswip_switch_w(priv, VLAN_ETH_FRAME_LEN + 8, GSWIP_MAC_FLEN); -- cgit v1.2.3-59-g8ed1b