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* [PATCH net v2] net: dsa: b53: Ensure the default VID is untagged
@ 2020-02-14 23:26 Florian Fainelli
  2020-02-17  3:23 ` David Miller
  0 siblings, 1 reply; 2+ messages in thread
From: Florian Fainelli @ 2020-02-14 23:26 UTC (permalink / raw)
  To: netdev
  Cc: olteanv, Florian Fainelli, Andrew Lunn, Vivien Didelot,
	David S. Miller, open list

We need to ensure that the default VID is untagged otherwise the switch
will be sending tagged frames and the results can be problematic. This
is especially true with b53 switches that use VID 0 as their default
VLAN since VID 0 has a special meaning.

Fixes: fea83353177a ("net: dsa: b53: Fix default VLAN ID")
Fixes: 061f6a505ac3 ("net: dsa: Add ndo_vlan_rx_{add, kill}_vid implementation")
Signed-off-by: Florian Fainelli <>
 drivers/net/dsa/b53/b53_common.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 449a22172e07..1a69286daa8d 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1366,6 +1366,9 @@ void b53_vlan_add(struct dsa_switch *ds, int port,
 		b53_get_vlan_entry(dev, vid, vl);
+		if (vid == 0 && vid == b53_default_pvid(dev))
+			untagged = true;
 		vl->members |= BIT(port);
 		if (untagged && !dsa_is_cpu_port(ds, port))
 			vl->untag |= BIT(port);

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2020-02-14 23:26 [PATCH net v2] net: dsa: b53: Ensure the default VID is untagged Florian Fainelli
2020-02-17  3:23 ` David Miller

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