staging: comedi: ni_660x: tidy up the counter subdevices init

For aesthetics, add some whitespace to the subdevice init and use
a couple local variables to make the code easier to follow.
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>

drivers/staging/comedi/drivers/ni_660x.c

@@ -864,6 +864,7 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 	const struct ni_660x_board *board = NULL;
 	struct ni_660x_private *devpriv;
 	struct comedi_subdevice *s;
+	struct ni_gpct_device *gpct_dev;
 	unsigned int n_counters;
 	int subdev;
 	int ret;
@@ -977,16 +978,24 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 	ni_660x_write(dev, 0, 0, NI660X_STC_DIO_CONTROL);
 
 	n_counters = board->n_chips * NI660X_COUNTERS_PER_CHIP;
-	devpriv->counter_dev = ni_gpct_device_construct(dev,
+	gpct_dev = ni_gpct_device_construct(dev,
 					    ni_660x_gpct_write,
 					    ni_660x_gpct_read,
 					    ni_gpct_variant_660x,
 					    n_counters);
-	if (!devpriv->counter_dev)
+	if (!gpct_dev)
 		return -ENOMEM;
+	devpriv->counter_dev = gpct_dev;
+
+	/* Counter subdevices (4 NI TIO General Purpose Counters per chip) */
 	for (i = 0; i < NI660X_MAX_COUNTERS; ++i) {
 		s = &dev->subdevices[subdev++];
 		if (i < n_counters) {
+			struct ni_gpct *counter = &gpct_dev->counters[i];
+
+			counter->chip_index = i / NI660X_COUNTERS_PER_CHIP;
+			counter->counter_index = i % NI660X_COUNTERS_PER_CHIP;
+
 			s->type		= COMEDI_SUBD_COUNTER;
 			s->subdev_flags	= SDF_READABLE | SDF_WRITABLE |
 					  SDF_LSAMPL | SDF_CMD_READ;
@@ -995,28 +1004,24 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 			s->insn_read	= ni_tio_insn_read;
 			s->insn_write	= ni_tio_insn_write;
 			s->insn_config	= ni_tio_insn_config;
-			s->do_cmd = &ni_660x_cmd;
 			s->len_chanlist	= 1;
+			s->do_cmd	= ni_660x_cmd;
 			s->do_cmdtest	= ni_tio_cmdtest;
-			s->cancel = &ni_660x_cancel;
-			s->poll = &ni_660x_input_poll;
+			s->cancel	= ni_660x_cancel;
+			s->poll		= ni_660x_input_poll;
+			s->buf_change	= ni_660x_buf_change;
 			s->async_dma_dir = DMA_BIDIRECTIONAL;
-			s->buf_change = &ni_660x_buf_change;
-			s->private = &devpriv->counter_dev->counters[i];
-
-			devpriv->counter_dev->counters[i].chip_index =
-			    i / NI660X_COUNTERS_PER_CHIP;
-			devpriv->counter_dev->counters[i].counter_index =
-			    i % NI660X_COUNTERS_PER_CHIP;
+			s->private	= counter;
 		} else {
 			s->type		= COMEDI_SUBD_UNUSED;
 		}
 	}
+
 	for (i = 0; i < board->n_chips; ++i)
 		init_tio_chip(dev, i);
 
 	for (i = 0; i < n_counters; ++i)
-		ni_tio_init_counter(&devpriv->counter_dev->counters[i]);
+		ni_tio_init_counter(&gpct_dev->counters[i]);
 
 	 /*
 	  * Default the DIO channels as: