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Subject[PATCH 5.13 094/151] net: dsa: microchip: ksz8795: Fix VLAN untagged flag change on deletion
Date
From: Ben Hutchings <ben.hutchings@mind.be>

[ Upstream commit af01754f9e3c553a2ee63b4693c79a3956e230ab ]

When a VLAN is deleted from a port, the flags in struct
switchdev_obj_port_vlan are always 0. ksz8_port_vlan_del() copies the
BRIDGE_VLAN_INFO_UNTAGGED flag to the port's Tag Removal flag, and
therefore always clears it.

In case there are multiple VLANs configured as untagged on this port -
which seems useless, but is allowed - deleting one of them changes the
remaining VLANs to be tagged.

It's only ever necessary to change this flag when a VLAN is added to
the port, so leave it unchanged in ksz8_port_vlan_del().

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 | 3 ---
1 file changed, 3 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index c20fb6edd420..46ef5bc79cbd 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1167,7 +1167,6 @@ static int ksz8_port_vlan_add(struct dsa_switch *ds, int port,
static int ksz8_port_vlan_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
- bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
struct ksz_device *dev = ds->priv;
u16 data, pvid;
u8 fid, member, valid;
@@ -1178,8 +1177,6 @@ static int ksz8_port_vlan_del(struct dsa_switch *ds, int port,
ksz_pread16(dev, port, REG_PORT_CTRL_VID, &pvid);
pvid = pvid & 0xFFF;

- ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged);
-
ksz8_r_vlan_table(dev, vlan->vid, &data);
ksz8_from_vlan(dev, data, &fid, &member, &valid);

--
2.30.2


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