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

From: Alvin Šipraga <redacted>

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 <redacted>
---
 net/dsa/switch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 1c797ec8e2c2..6466d0539af9 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c

@@ -168,7 +168,7 @@ 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;
 	}
 

-- 
2.32.0

On Tue, Oct 12, 2021 at 01:27:31PM +0200, Alvin Šipraga wrote:

Ouch, good catch.

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

On 10/12/21 4:27 AM, Alvin Šipraga wrote:

From: Alvin Šipraga <redacted>

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 <redacted>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski [off-list ref]:

On Tue, 12 Oct 2021 13:27:31 +0200 you wrote:

From: Alvin Šipraga <redacted>

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

  port 2 failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: -EOPNOTSUPP

[...]

Here is the summary with links:
  - [net] net: dsa: fix spurious error message when unoffloaded port leaves bridge
    https://git.kernel.org/netdev/net/c/43a4b4dbd48c

You are awesome, thank you!
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