Re: [PATCH net-next] net: dsa: fix preparation of a port STP update

From: David Miller
Date: Wed Sep 30 2015 - 00:35:22 EST

From: Vivien Didelot <vivien.didelot@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 29 Sep 2015 12:38:36 -0400

> Because of the default 0 value of ret in dsa_slave_port_attr_set, a
> driver may return -EOPNOTSUPP from the commit phase of a STP state,
> which triggers a WARN() from switchdev.
> This happened on a 6185 switch which does not support hardware bridging.
> Reported-by: Andrew Lunn <andrew@xxxxxxx>
> Signed-off-by: Vivien Didelot <vivien.didelot@xxxxxxxxxxxxxxxxxxxx>

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