staging: comedi: don't clear 'data' on (*insn_read) timeout

It's not necessary to clear the returned data pointer when an (*insn_read)
times out. For aesthetics, remove all of these in the drivers.
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/adl_pci9111.c

@@ -748,7 +748,6 @@ static int pci9111_ai_insn_read(struct comedi_device *dev,
 
 		ret = comedi_timeout(dev, s, insn, pci9111_ai_eoc, 0);
 		if (ret) {
-			data[i] = 0;
 			pci9111_fifo_reset(dev);
 			return ret;
 		}

drivers/staging/comedi/drivers/adl_pci9118.c

@@ -614,7 +614,6 @@ static int pci9118_insn_read_ai(struct comedi_device *dev,
 
 		ret = comedi_timeout(dev, s, insn, pci9118_ai_eoc, 0);
 		if (ret) {
-			data[n] = 0;
 			outl(0, dev->iobase + PCI9118_DELFIFO);	/* flush FIFO */
 			return ret;
 		}

drivers/staging/comedi/drivers/adv_pci1710.c

@@ -469,7 +469,6 @@ static int pci171x_insn_read_ai(struct comedi_device *dev,
 		if (ret) {
 			outb(0, dev->iobase + PCI171x_CLRFIFO);
 			outb(0, dev->iobase + PCI171x_CLRINT);
-			data[n] = 0;
 			return ret;
 		}
 

drivers/staging/comedi/drivers/dyna_pci10xx.c

@@ -93,10 +93,8 @@ static int dyna_pci10xx_insn_read_ai(struct comedi_device *dev,
 		udelay(10);
 
 		ret = comedi_timeout(dev, s, insn, dyna_pci10xx_ai_eoc, 0);
-		if (ret) {
-			data[n] = 0;
+		if (ret)
 			break;
-		}
 
 		/* read data */
 		d = inw_p(dev->iobase);

drivers/staging/comedi/drivers/icp_multi.c

@@ -215,11 +215,8 @@ static int icp_multi_insn_read_ai(struct comedi_device *dev,
 
 		/*  Wait for conversion to complete, or get fed up waiting */
 		ret = comedi_timeout(dev, s, insn, icp_multi_ai_eoc, 0);
-		if (ret) {
-			/*  Clear data received */
-			data[n] = 0;
+		if (ret)
 			break;
-		}
 
 		data[n] =
 		    (readw(devpriv->io_addr + ICP_MULTI_AI) >> 4) & 0x0fff;

drivers/staging/comedi/drivers/pcl816.c

@@ -196,7 +196,6 @@ static int pcl816_ai_insn_read(struct comedi_device *dev,
 
 		ret = comedi_timeout(dev, s, insn, pcl816_ai_eoc, 0);
 		if (ret) {
-			data[0] = 0;
 			/* clear INT (conversion end) flag */
 			outb(0, dev->iobase + PCL816_CLRINT);
 			return ret;