From: Ben Hutchings ben.hutchings@mind.be
[ Upstream commit 164844135a3f215d3018ee9d6875336beb942413 ]
Currently ksz8_port_vlan_filtering() sets or clears the VLAN Enable hardware flag. That controls discarding of packets with a VID that has not been enabled for any port on the switch.
Since it is a global flag, set the dsa_switch::vlan_filtering_is_global flag so that the DSA core understands this can't be controlled per port.
When VLAN filtering is enabled, the switch should also discard packets with a VID that's not enabled on the ingress port. Set or clear each external port's VLAN Ingress Filter flag in ksz8_port_vlan_filtering() to make that happen.
Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver") Signed-off-by: Ben Hutchings ben.hutchings@mind.be Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/microchip/ksz8795.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c index 1e101ab56cea..108a14db1f1a 100644 --- a/drivers/net/dsa/microchip/ksz8795.c +++ b/drivers/net/dsa/microchip/ksz8795.c @@ -790,8 +790,14 @@ static int ksz8795_port_vlan_filtering(struct dsa_switch *ds, int port, if (switchdev_trans_ph_prepare(trans)) return 0;
+ /* Discard packets with VID not enabled on the switch */ ksz_cfg(dev, S_MIRROR_CTRL, SW_VLAN_ENABLE, flag);
+ /* Discard packets with VID not enabled on the ingress port */ + for (port = 0; port < dev->phy_port_cnt; ++port) + ksz_port_cfg(dev, port, REG_PORT_CTRL_2, PORT_INGRESS_FILTER, + flag); + return 0; }
@@ -1266,6 +1272,11 @@ static int ksz8795_switch_init(struct ksz_device *dev) /* set the real number of ports */ dev->ds->num_ports = dev->port_cnt + 1;
+ /* VLAN filtering is partly controlled by the global VLAN + * Enable flag + */ + dev->ds->vlan_filtering_is_global = true; + return 0; }