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

[Oleksij Rempel]

Hi Vladimir,

I have a regression after this patch:
|commit bfcb813203e619a8960a819bf533ad2a108d8105                                                      
|Author:     Vladimir Oltean <vladimir.oltean@xxxxxxx>                                                
|
|  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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