openwrt/target/linux/generic/backport-4.14/424-v4.20-net-dsa-fix-88e6060-roaming.patch

From a74515604a7b171f2702bdcbd1e231225fb456d0 Mon Sep 17 00:00:00 2001
From: Anderson Luiz Alves <alacn1@gmail.com>
Date: Fri, 30 Nov 2018 21:58:36 -0200
Subject: [PATCH] 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@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/mv88e6060.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

--- a/drivers/net/dsa/mv88e6060.c
+++ b/drivers/net/dsa/mv88e6060.c
@@ -114,8 +114,7 @@ static int mv88e6060_switch_reset(struct
 	/* 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;
@@ -140,13 +139,10 @@ static int mv88e6060_setup_global(struct
 	 */
 	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;
 }