staging: comedi: pcmmio: remove 'asic_chan' from subdevice private data

The first 'asic_chan' that supports interrupts in the interrupt subdevice is
always initialized to '0'. Remove this unneeded information from the subdevice
private data.
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/pcmmio.c

@@ -214,11 +214,6 @@ struct pcmmio_subdev_private {
 				 * that have interrutps
 				 */
 				int num_asic_chans;
-				/*
-				 * if nonnegative, the first channel id with
-				 * respect to the asic that has interrupts
-				 */
-				int asic_chan;
 				/*
 				 * subdev-relative channel mask for channels
 				 * we are interested in
@@ -451,8 +446,7 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
 
 						if (subpriv->dio.intr.active) {
 							unsigned mytrig =
-							    ((triggered >>
-							      subpriv->dio.intr.asic_chan)
+							    ((triggered >> 0)
 							     &
 							     ((0x1 << subpriv->
 							       dio.intr.
@@ -542,7 +536,7 @@ static int pcmmio_start_intr(struct comedi_device *dev,
 		subpriv->dio.intr.enabled_mask = 0;
 		subpriv->dio.intr.active = 1;
 		nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT;
-		firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT;
+		firstport = 0 / CHANS_PER_PORT;
 		if (cmd->chanlist) {
 			for (n = 0; n < cmd->chanlist_len; n++) {
 				bits |= (1U << CR_CHAN(cmd->chanlist[n]));
@@ -962,7 +956,6 @@ static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	subpriv = s->private;
 	subpriv->dio.intr.active = 0;
 	subpriv->dio.intr.stop_count = 0;
-	subpriv->dio.intr.asic_chan = 0;
 	subpriv->dio.intr.num_asic_chans = 24;
 
 	spin_lock_init(&subpriv->dio.intr.spinlock);