staging: comedi: ni_labpc: fix labpc_calib_insn_read()
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Tue, 26 Mar 2013 17:27:11 +0000 (10:27 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 26 Mar 2013 23:14:51 +0000 (16:14 -0700)
The comedi core expects the (*insn_read) operations to read insn->n
values and return the number of values actually read.

Make this function work like the core expects.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers/ni_labpc.c

index b0ec088a7285e76fb9d0999c2d06ed47364c0e7d..bae72eb734512a8a48af8e1d4e7d622050b3a39c 100644 (file)
@@ -1551,10 +1551,13 @@ static int labpc_calib_insn_read(struct comedi_device *dev,
                                 unsigned int *data)
 {
        struct labpc_private *devpriv = dev->private;
+       unsigned int chan = CR_CHAN(insn->chanspec);
+       int i;
 
-       data[0] = devpriv->caldac[CR_CHAN(insn->chanspec)];
+       for (i = 0; i < insn->n; i++)
+               data[i] = devpriv->caldac[chan];
 
-       return 1;
+       return insn->n;
 }
 
 static int labpc_eeprom_insn_write(struct comedi_device *dev,