netdev - dsa: sja1105: regression after patch: "net: dsa: configure the MTU for switch ports"

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Message-ID: <20200421113324.vxh2lyasylf5kgkz@pengutronix.de>
Date:   Tue, 21 Apr 2020 13:33:24 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     mkl@...gutronix.de, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>, kernel@...gutronix.de,
        netdev <netdev@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>, david@...tonic.nl,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>
Subject: dsa: sja1105: regression after patch: "net: dsa: configure the MTU
 for switch ports"

Hi Vladimir,

I have a regression after this patch:
|commit bfcb813203e619a8960a819bf533ad2a108d8105                                                      
|Author:     Vladimir Oltean <vladimir.oltean@....com>                                                
|
|  net: dsa: configure the MTU for switch ports

with following log:
[    3.044065] sja1105 spi1.0: Probed switch chip: SJA1105Q                                          
[    3.071385] sja1105 spi1.0: Enabled switch tagging                                                
[    3.076484] sja1105 spi1.0: error -34 setting MTU on port 0                                       
[    3.082795] sja1105: probe of spi1.0 failed with error -34

this is devicetree snippet for the port 0:
	port@0 {
		reg = <0>;
		label = "usb";
		phy-handle = <&usbeth_phy>;
		phy-mode = "rmii";
	};


Is it know issue?

Regards,
Oleksij
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