net: dsa: b53: Turn off Broadcom tags for more switches

Models such as BCM5395/97/98 and BCM53125/24/53115 and compatible require that
we turn on managed mode to actually act on Broadcom tags, otherwise they just
pass them through on ingress (host -> switch) and don't insert them in egress
(switch -> host). Turning on managed mode is simple, but requires us to
properly support ARL misses on multicast addresses which is a much more
involved set of changes not suitable for a bug fix for this release.

Reported-by: Jochen Friedrich <jochen@scram.de>
Fixes: 7edc58d614d4 ("net: dsa: b53: Turn on Broadcom tags")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index f5a8dd9..4498ab8 100644 (file)
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1500,10 +1500,13 @@ static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds,
 {
        struct b53_device *dev = ds->priv;
 
-       /* Older models support a different tag format that we do not
-        * support in net/dsa/tag_brcm.c yet.
+       /* Older models (5325, 5365) support a different tag format that we do
+        * not support in net/dsa/tag_brcm.c yet. 539x and 531x5 require managed
+        * mode to be turned on which means we need to specifically manage ARL
+        * misses on multicast addresses (TBD).
         */
-       if (is5325(dev) || is5365(dev) || !b53_can_enable_brcm_tags(ds, port))
+       if (is5325(dev) || is5365(dev) || is539x(dev) || is531x5(dev) ||
+           !b53_can_enable_brcm_tags(ds, port))
                return DSA_TAG_PROTO_NONE;
 
        /* Broadcom BCM58xx chips have a flow accelerator on Port 8