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When eswitch is unsupported, currently -EPERM error code is returned
instead of -EOPNOTSUPP.
Due to this VF device's devlink virtual port is not enumerated because
port_function_get() callback returned -EPERM instead of -EOPNOTSUPP.
Hence, return the error code -EOPNOTSUPP when eswitch is unsupported.
Fixes: bd93975353 ("net/mlx5: E-switch, Introduce and use eswitch support check helper")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>