linux-kernel - [PATCH v3 net] mv88e6060: disable hardware level MAC learning

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Date:   Fri, 30 Nov 2018 21:58:36 -0200
From:   Anderson Luiz Alves <alacn1@...il.com>
To:     andrew@...n.ch, vivien.didelot@...oirfairelinux.com,
        f.fainelli@...il.com, davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Anderson Luiz Alves <alacn1@...il.com>
Subject: [PATCH v3 net] mv88e6060: disable hardware level MAC learning

Disable hardware level MAC learning because it breaks station roaming.
When enabled it drops all frames that arrive from a MAC address
that is on a different port at learning table.

Signed-off-by: Anderson Luiz Alves <alacn1@...il.com>
---

Notes:
    v2: Updated code comments.
    v3: Sent with correct whitespaces.

 drivers/net/dsa/mv88e6060.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/mv88e6060.c b/drivers/net/dsa/mv88e6060.c
index 65f10fec2..0b3e51f24 100644
--- a/drivers/net/dsa/mv88e6060.c
+++ b/drivers/net/dsa/mv88e6060.c
@@ -116,8 +116,7 @@ static int mv88e6060_switch_reset(struct dsa_switch *ds)
 	/* Reset the switch. */
 	REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
 		  GLOBAL_ATU_CONTROL_SWRESET |
-		  GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
-		  GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
+		  GLOBAL_ATU_CONTROL_LEARNDIS);
 
 	/* Wait up to one second for reset to complete. */
 	timeout = jiffies + 1 * HZ;
@@ -142,13 +141,10 @@ static int mv88e6060_setup_global(struct dsa_switch *ds)
 	 */
 	REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, GLOBAL_CONTROL_MAX_FRAME_1536);
 
-	/* Enable automatic address learning, set the address
-	 * database size to 1024 entries, and set the default aging
-	 * time to 5 minutes.
+	/* Disable automatic address learning.
 	 */
 	REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
-		  GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
-		  GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
+		  GLOBAL_ATU_CONTROL_LEARNDIS);
 
 	return 0;
 }
-- 
2.17.1