net: dsa: fix spurious error message when unoffloaded port leaves bridge

commit 43a4b4dbd48c9006ef64df3a12acf33bdfe11c61 upstream.

Flip the sign of a return value check, thereby suppressing the following
spurious error:

  port 2 failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: -EOPNOTSUPP

... which is emitted when removing an unoffloaded DSA switch port from a
bridge.

Fixes: d371b7c92d19 ("net: dsa: Unset vlan_filtering when ports leave the bridge")
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211012112730.3429157-1-alvin@pqrs.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 5ece05dfd8f2c7070953bc52e4883d2ee7992a0c..9ef91257133216aff90709cbd072946ce0ffc14a 100644 (file)
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -148,7 +148,7 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds,
                if (extack._msg)
                        dev_err(ds->dev, "port %d: %s\n", info->port,
                                extack._msg);
-               if (err && err != EOPNOTSUPP)
+               if (err && err != -EOPNOTSUPP)
                        return err;
        }
        return 0;