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dbc should not be aware of, or use any dbctty specific variables. currenly dbc driver reads the port->registered flag to see if the callbacks should be called. Only makes these decisions based on dbc internal state instead. Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Link: https://lore.kernel.org/r/20200723144530.9992-27-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>