staging: comedi: ni_daq_700: fix return for insn_config function
authorH Hartley Sweeten <hartleys@visionengravers.com>
Fri, 22 Jun 2012 23:35:57 +0000 (16:35 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 23 Jun 2012 03:55:09 +0000 (20:55 -0700)
The comedi insn_config functions should return < 0 for errors or
the number of data elements used to perform the command, this value
is available as 'insn->n'. Return that instead of the open coded
number to better indicate what the return means.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers/ni_daq_700.c

index 2ea3c8d5194ce88fa2663df12f4f4ecedb549636..cc469480ff4f2e33518c92f8840a085ed7343ab1 100644 (file)
@@ -89,13 +89,12 @@ static int subdev_700_insn_config(struct comedi_device *dev,
                break;
        case INSN_CONFIG_DIO_QUERY:
                data[1] = (s->io_bits & chan) ? COMEDI_OUTPUT : COMEDI_INPUT;
-               return insn->n;
                break;
        default:
                return -EINVAL;
        }
 
-       return 1;
+       return insn->n;
 }
 
 static int dio700_attach(struct comedi_device *dev, struct comedi_devconfig *it)