staging: comedi: adl_pci9118: remove 'int_ai_func' from private data

The devpriv->usedma flag can be checked to determine which handler
function should be used to transfer the analog input data. Do that
instead and remove the member from the private data.
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/adl_pci9118.c

@@ -369,13 +369,6 @@ struct pci9118_private {
 						 * users(0-AI, 1-AO, 2-DI, 3-DO)
 						 */
 	unsigned int cnt0_divisor;		/* actual CNT0 divisor */
-	void (*int_ai_func)(struct comedi_device *, struct comedi_subdevice *,
-		unsigned short,
-		unsigned int,
-		unsigned short);	/*
-					 * ptr to actual interrupt
-					 * AI function
-					 */
 	unsigned char usedma;		/* =1 use DMA transfer and not INT */
 	int softsshdelay;		/*
 					 * >0 use software S&H,
@@ -1040,6 +1033,7 @@ static void interrupt_pci9118_ai_dma(struct comedi_device *dev,
 static irqreturn_t interrupt_pci9118(int irq, void *d)
 {
 	struct comedi_device *dev = d;
+	struct comedi_subdevice *s = dev->read_subdev;
 	struct pci9118_private *devpriv = dev->private;
 	unsigned int int_daq = 0, int_amcc, int_adstat;
 
@@ -1061,7 +1055,7 @@ static irqreturn_t interrupt_pci9118(int irq, void *d)
 					/* get STATUS register */
 
 	if (devpriv->ai_do) {
-		if (devpriv->ai12_startstop)
+		if (devpriv->ai12_startstop) {
 			if ((int_adstat & AdStatus_DTH) &&
 							(int_daq & Int_DTrg)) {
 						/* start stop of measure */
@@ -1095,9 +1089,14 @@ static irqreturn_t interrupt_pci9118(int irq, void *d)
 					}
 				}
 			}
+		}
 
-		(devpriv->int_ai_func) (dev, dev->read_subdev, int_adstat,
-					int_amcc, int_daq);
+		if (devpriv->usedma)
+			interrupt_pci9118_ai_dma(dev, s, int_adstat,
+						 int_amcc, int_daq);
+		else
+			interrupt_pci9118_ai_onesample(dev, s, int_adstat,
+						       int_amcc, int_daq);
 
 	}
 	return IRQ_HANDLED;
@@ -1472,9 +1471,6 @@ static int pci9118_ai_docmd_sampl(struct comedi_device *dev,
 		return -EIO;
 	}
 
-	devpriv->int_ai_func = interrupt_pci9118_ai_onesample;
-						/* transfer function */
-
 	if (devpriv->ai12_startstop)
 		pci9118_exttrg_add(dev, EXTTRG_AI);
 						/* activate EXT trigger */
@@ -1553,9 +1549,6 @@ static int pci9118_ai_docmd_dma(struct comedi_device *dev,
 						/* activate EXT trigger */
 	}
 
-	devpriv->int_ai_func = interrupt_pci9118_ai_dma;
-						/* transfer function */
-
 	outl(0x02000000 | AINT_WRITE_COMPL,
 	     devpriv->iobase_a + AMCC_OP_REG_INTCSR);