staging: comedi: rti802: tidy up rti802_ao_insn_read()

To clarify the function a bit, add a local variable for the 'chan'
that is being read and change the final return to 'insn->n'.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/rti802.c b/drivers/staging/comedi/drivers/rti802.c
index c5c37a2..c1f4b3b 100644 (file)
--- a/drivers/staging/comedi/drivers/rti802.c
+++ b/drivers/staging/comedi/drivers/rti802.c
@@ -49,15 +49,17 @@ struct rti802_private {
 
 static int rti802_ao_insn_read(struct comedi_device *dev,
                               struct comedi_subdevice *s,
-                              struct comedi_insn *insn, unsigned int *data)
+                              struct comedi_insn *insn,
+                              unsigned int *data)
 {
        struct rti802_private *devpriv = dev->private;
+       unsigned int chan = CR_CHAN(insn->chanspec);
        int i;
 
        for (i = 0; i < insn->n; i++)
-               data[i] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
+               data[i] = devpriv->ao_readback[chan];
 
-       return i;
+       return insn->n;
 }
 
 static int rti802_ao_insn_write(struct comedi_device *dev,