linux_dsm_epyc7002/net/dsa
Vladimir Oltean 09fdb6747b net: dsa: tag_8021q: fix the VLAN IDs used for encoding sub-VLANs
[ Upstream commit 4ef8d857b5f494e62bce9085031563fda35f9563 ]

When using sub-VLANs in the range of 1-7, the resulting value from:

	rx_vid = dsa_8021q_rx_vid_subvlan(ds, port, subvlan);

is wrong according to the description from tag_8021q.c:

 | 11  | 10  |  9  |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |  0  |
 +-----------+-----+-----------------+-----------+-----------------------+
 |    DIR    | SVL |    SWITCH_ID    |  SUBVLAN  |          PORT         |
 +-----------+-----+-----------------+-----------+-----------------------+

For example, when ds->index == 0, port == 3 and subvlan == 1,
dsa_8021q_rx_vid_subvlan() returns 1027, same as it returns for
subvlan == 0, but it should have returned 1043.

This is because the low portion of the subvlan bits are not masked
properly when writing into the 12-bit VLAN value. They are masked into
bits 4:3, but they should be masked into bits 5:4.

Fixes: 3eaae1d05f ("net: dsa: tag_8021q: support up to 8 VLANs per port using sub-VLANs")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-06-10 13:39:17 +02:00
..
dsa2.c net: dsa: Fix type was not set for devlink port 2021-04-14 08:42:07 +02:00
dsa_priv.h
dsa.c
Kconfig
Makefile
master.c net: dsa: fix a crash if ->get_sset_count() fails 2021-06-03 09:00:38 +02:00
port.c
slave.c net: dsa: fix error code getting shifted with 4 in dsa_slave_get_sset_count 2021-06-03 09:00:45 +02:00
switch.c
tag_8021q.c net: dsa: tag_8021q: fix the VLAN IDs used for encoding sub-VLANs 2021-06-10 13:39:17 +02:00
tag_ar9331.c
tag_brcm.c
tag_dsa.c
tag_edsa.c
tag_gswip.c
tag_ksz.c
tag_lan9303.c
tag_mtk.c net: dsa: tag_mtk: fix 802.1ad VLAN egress 2021-03-17 17:06:22 +01:00
tag_ocelot.c
tag_qca.c
tag_rtl4_a.c
tag_sja1105.c
tag_trailer.c