[PATCH V2] staging: comedi: dt2801: remove old unused code

[Deepak R Varma <mh12gx2825@gmail.com>]

patch V2 revision is for updating the patch description only.
There are two #if 0 blocks that have no recent history of any change. We
can remove those code blocks for improved readability of the code.

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
---
 drivers/staging/comedi/drivers/dt2801.c | 22 ------------------
 drivers/staging/comedi/drivers/dt282x.c | 30 +------------------------
 2 files changed, 1 insertion(+), 51 deletions(-)

diff --git a/drivers/staging/comedi/drivers/dt2801.c b/drivers/staging/comedi/drivers/dt2801.c
index a29880981d81..aad02faa2f83 100644
--- a/drivers/staging/comedi/drivers/dt2801.c
+++ b/drivers/staging/comedi/drivers/dt2801.c
@@ -87,17 +87,6 @@
 #define DT2801_STATUS		1
 #define DT2801_CMD		1
 
-#if 0
-/* ignore 'defined but not used' warning */
-static const struct comedi_lrange range_dt2801_ai_pgh_bipolar = {
-	4, {
-		BIP_RANGE(10),
-		BIP_RANGE(5),
-		BIP_RANGE(2.5),
-		BIP_RANGE(1.25)
-	}
-};
-#endif
 static const struct comedi_lrange range_dt2801_ai_pgl_bipolar = {
 	4, {
 		BIP_RANGE(10),
@@ -107,17 +96,6 @@ static const struct comedi_lrange range_dt2801_ai_pgl_bipolar = {
 	}
 };
 
-#if 0
-/* ignore 'defined but not used' warning */
-static const struct comedi_lrange range_dt2801_ai_pgh_unipolar = {
-	4, {
-		UNI_RANGE(10),
-		UNI_RANGE(5),
-		UNI_RANGE(2.5),
-		UNI_RANGE(1.25)
-	}
-};
-#endif
 static const struct comedi_lrange range_dt2801_ai_pgl_unipolar = {
 	4, {
 		UNI_RANGE(10),
diff --git a/drivers/staging/comedi/drivers/dt282x.c b/drivers/staging/comedi/drivers/dt282x.c
index e15e33ed94ae..89dc84d3c803 100644
--- a/drivers/staging/comedi/drivers/dt282x.c
+++ b/drivers/staging/comedi/drivers/dt282x.c
@@ -484,14 +484,7 @@ static void dt282x_ai_dma_interrupt(struct comedi_device *dev,
 		s->async->events |= COMEDI_CB_EOA;
 		return;
 	}
-#if 0
-	/* clear the dual dma flag, making this the last dma segment */
-	/* XXX probably wrong */
-	if (!devpriv->ntrig) {
-		devpriv->supcsr &= ~DT2821_SUPCSR_DDMA;
-		outw(devpriv->supcsr, dev->iobase + DT2821_SUPCSR_REG);
-	}
-#endif
+
 	/* restart the channel */
 	dt282x_prep_ai_dma(dev, dma->cur_dma, 0);
 
@@ -534,28 +527,7 @@ static irqreturn_t dt282x_interrupt(int irq, void *d)
 		s_ao->async->events |= COMEDI_CB_ERROR;
 		handled = 1;
 	}
-#if 0
-	if (adcsr & DT2821_ADCSR_ADDONE) {
-		unsigned short data;
-
-		data = inw(dev->iobase + DT2821_ADDAT_REG);
-		data &= s->maxdata;
-		if (devpriv->ad_2scomp)
-			data = comedi_offset_munge(s, data);
 
-		comedi_buf_write_samples(s, &data, 1);
-
-		devpriv->nread--;
-		if (!devpriv->nread) {
-			s->async->events |= COMEDI_CB_EOA;
-		} else {
-			if (supcsr & DT2821_SUPCSR_SCDN)
-				outw(devpriv->supcsr | DT2821_SUPCSR_STRIG,
-				     dev->iobase + DT2821_SUPCSR_REG);
-		}
-		handled = 1;
-	}
-#endif
 	comedi_handle_events(dev, s);
 	if (s_ao)
 		comedi_handle_events(dev, s_ao);
-- 
2.17.1