netdev - [PATCH net 0/3] net: dsa: b53: minor fdb related fixes

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Message-ID: <20251102100758.28352-1-jonas.gorski@gmail.com>
Date: Sun,  2 Nov 2025 11:07:55 +0100
From: Jonas Gorski <jonas.gorski@...il.com>
To: Florian Fainelli <florian.fainelli@...adcom.com>,
	Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Vivien Didelot <vivien.didelot@...il.com>
Cc: Florian Fainelli <f.fainelli@...il.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net 0/3] net: dsa: b53: minor fdb related fixes

While investigating and fixing/implenting proper ARL support for
bcm63xx, I encountered multiple minor issues in the current ARL
implementation:

* The ARL multicast support was not properly enabled for older chips,
  and instead a potentially reserved bit was toggled.
* While traversing the ARL table, "Search done" triggered one final
  entry which will be invalid for 4 ARL bin chips, and failed to stop
  the search on chips with only one result register.
* For chips where we have only one result register, we only traversed at
  most half the maximum entries.

I also had a fix for IVL_SVL_SELECT which is only valid for some chips,
but since this would only have an effect for !vlan_enabled, and we
always have that enabled, it isn't really worth fixing (and rather drop
the !vlan_enabled paths).

Jonas Gorski (3):
  net: dsa: b53: fix enabling ip multicast
  net: dsa: b53: stop reading ARL entries if search is done
  net: dsa: b53: properly bound ARL searches for < 4 ARL bin chips

 drivers/net/dsa/b53/b53_common.c | 15 +++++++++------
 drivers/net/dsa/b53/b53_regs.h   |  3 +--
 2 files changed, 10 insertions(+), 8 deletions(-)

base-commit: d7d2fcf7ae31471b4e08b7e448b8fd0ec2e06a1b
-- 
2.43.0