openwrt/target/linux/generic/backport-5.4/771-v5.12-net-dsa-be-louder-when-a-non-legacy-FDB-operation-fa.patch

From 2fd186501b1cff155cc4a755c210793cfc0dffb5 Mon Sep 17 00:00:00 2001
From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: Wed, 6 Jan 2021 11:51:31 +0200
Subject: [PATCH] net: dsa: be louder when a non-legacy FDB operation fails

The dev_close() call was added in commit c9eb3e0f8701 ("net: dsa: Add
support for learning FDB through notification") "to indicate inconsistent
situation" when we could not delete an FDB entry from the port.

bridge fdb del d8:58:d7:00:ca:6d dev swp0 self master

It is a bit drastic and at the same time not helpful if the above fails
to only print with netdev_dbg log level, but on the other hand to bring
the interface down.

So increase the verbosity of the error message, and drop dev_close().

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/dsa/slave.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1595,7 +1595,9 @@ static void dsa_slave_switchdev_event_wo
 
 		err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
 		if (err) {
-			netdev_dbg(dev, "fdb add failed err=%d\n", err);
+			netdev_err(dev,
+				   "failed to add %pM vid %d to fdb: %d\n",
+				   fdb_info->addr, fdb_info->vid, err);
 			break;
 		}
 		fdb_info->offloaded = true;
@@ -1610,9 +1612,11 @@ static void dsa_slave_switchdev_event_wo
 
 		err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
 		if (err) {
-			netdev_dbg(dev, "fdb del failed err=%d\n", err);
-			dev_close(dev);
+			netdev_err(dev,
+				   "failed to delete %pM vid %d from fdb: %d\n",
+				   fdb_info->addr, fdb_info->vid, err);
 		}
+
 		break;
 	}
 	rtnl_unlock();