The 'ni_at_a2150' module links to `cfc_write_to_buffer` in the
'comedi_fc' module, so selecting 'COMEDI_NI_AT_A2150' in the kernel config
needs to also select 'COMEDI_FC'.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: stable <stable@vger.kernel.org> # 3.6+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 
 config COMEDI_NI_AT_A2150
        tristate "NI AT-A2150 ISA card support"
+       select COMEDI_FC
        depends on VIRT_TO_BUS
        ---help---
          Enable support for National Instruments AT-A2150 cards