staging: comedi: ni_tio.h: remove subdev_to_counter()

This inline helper function simply returns the s->private void *.
Remove the helper and just get the s->private void * directly where
needed.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: NIan Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/ni_660x.c

@@ -815,11 +815,9 @@ static void ni_660x_release_mite_channel(struct comedi_device *dev,
 
 static int ni_660x_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 {
+	struct ni_gpct *counter = s->private;
 	int retval;
 
-	struct ni_gpct *counter = subdev_to_counter(s);
-/* const struct comedi_cmd *cmd = &s->async->cmd; */
-
 	retval = ni_660x_request_mite_channel(dev, counter, COMEDI_INPUT);
 	if (retval) {
 		comedi_error(dev,
@@ -835,14 +833,14 @@ static int ni_660x_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 static int ni_660x_cmdtest(struct comedi_device *dev,
 			   struct comedi_subdevice *s, struct comedi_cmd *cmd)
 {
-	struct ni_gpct *counter = subdev_to_counter(s);
+	struct ni_gpct *counter = s->private;
 
 	return ni_tio_cmdtest(counter, cmd);
 }
 
 static int ni_660x_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
 {
-	struct ni_gpct *counter = subdev_to_counter(s);
+	struct ni_gpct *counter = s->private;
 	int retval;
 
 	retval = ni_tio_cancel(counter);
@@ -866,7 +864,9 @@ static void set_tio_counterswap(struct comedi_device *dev, int chipset)
 static void ni_660x_handle_gpct_interrupt(struct comedi_device *dev,
 					  struct comedi_subdevice *s)
 {
-	ni_tio_handle_interrupt(subdev_to_counter(s), s);
+	struct ni_gpct *counter = s->private;
+
+	ni_tio_handle_interrupt(counter, s);
 	if (s->async->events) {
 		if (s->async->events & (COMEDI_CB_EOA | COMEDI_CB_ERROR |
 					COMEDI_CB_OVERFLOW)) {
@@ -901,11 +901,12 @@ static int ni_660x_input_poll(struct comedi_device *dev,
 			      struct comedi_subdevice *s)
 {
 	struct ni_660x_private *devpriv = dev->private;
+	struct ni_gpct *counter = s->private;
 	unsigned long flags;
 
 	/* lock to avoid race with comedi_poll */
 	spin_lock_irqsave(&devpriv->interrupt_lock, flags);
-	mite_sync_input_dma(subdev_to_counter(s)->mite_chan, s->async);
+	mite_sync_input_dma(counter->mite_chan, s->async);
 	spin_unlock_irqrestore(&devpriv->interrupt_lock, flags);
 	return comedi_buf_read_n_available(s->async);
 }
@@ -915,10 +916,10 @@ static int ni_660x_buf_change(struct comedi_device *dev,
 			      unsigned long new_size)
 {
 	struct ni_660x_private *devpriv = dev->private;
+	struct ni_gpct *counter = s->private;
 	int ret;
 
-	ret = mite_buf_change(mite_ring(devpriv, subdev_to_counter(s)),
-			      s->async);
+	ret = mite_buf_change(mite_ring(devpriv, counter), s->async);
 	if (ret < 0)
 		return ret;
 
@@ -978,7 +979,9 @@ static int
 ni_660x_GPCT_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
 		   struct comedi_insn *insn, unsigned int *data)
 {
-	return ni_tio_rinsn(subdev_to_counter(s), insn, data);
+	struct ni_gpct *counter = s->private;
+
+	return ni_tio_rinsn(counter, insn, data);
 }
 
 static void init_tio_chip(struct comedi_device *dev, int chipset)
@@ -1003,14 +1006,18 @@ static int
 ni_660x_GPCT_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
 			 struct comedi_insn *insn, unsigned int *data)
 {
-	return ni_tio_insn_config(subdev_to_counter(s), insn, data);
+	struct ni_gpct *counter = s->private;
+
+	return ni_tio_insn_config(counter, insn, data);
 }
 
 static int ni_660x_GPCT_winsn(struct comedi_device *dev,
 			      struct comedi_subdevice *s,
 			      struct comedi_insn *insn, unsigned int *data)
 {
-	return ni_tio_winsn(subdev_to_counter(s), insn, data);
+	struct ni_gpct *counter = s->private;
+
+	return ni_tio_winsn(counter, insn, data);
 }
 
 static int ni_660x_dio_insn_bits(struct comedi_device *dev,

drivers/staging/comedi/drivers/ni_tio.h

@@ -150,9 +150,4 @@ void ni_tio_acknowledge_and_confirm(struct ni_gpct *,
 				    int *gate_error, int *tc_error,
 				    int *perm_stale_data, int *stale_data);
 
-static inline struct ni_gpct *subdev_to_counter(struct comedi_subdevice *s)
-{
-	return s->private;
-}
-
 #endif /* _COMEDI_NI_TIO_H */