net: dsa: mv88e6xxx: handle unknown duplex modes gracefully in mv88e6xxx_port_set_duplex
commitc031a613ff80001c7d02bcbe431509e009d7bde2
authorHeiner Kallweit <hkallweit1@gmail.com>
Fri, 1 Mar 2019 18:53:57 +0000 (1 19:53 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 13 Mar 2019 21:03:07 +0000 (13 14:03 -0700)
treeef042f4f8ee674193c4ed0f81a6e37e1d93bc13e
parent412a0e856464b3a063afa721bb928fa0257a9752
net: dsa: mv88e6xxx: handle unknown duplex modes gracefully in mv88e6xxx_port_set_duplex

[ Upstream commit c6195a8bdfc62a7cecf7df685e64847a4b700275 ]

When testing another issue I faced the problem that
mv88e6xxx_port_setup_mac() failed due to DUPLEX_UNKNOWN being passed
as argument to mv88e6xxx_port_set_duplex(). We should handle this case
gracefully and return -EOPNOTSUPP, like e.g. mv88e6xxx_port_set_speed()
is doing it.

Fixes: 7f1ae07b51e8 ("net: dsa: mv88e6xxx: add port duplex setter")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/dsa/mv88e6xxx/port.c