staging: comedi: pcmmio: tidy up pcmmio_handle_dio_intr()

Refactor the code to remove some of the indent levels.

Remove 'mytrig', the shift and mask end up making it the same as 'triggered'
anyway.
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

@@ -359,25 +359,27 @@ static void pcmmio_handle_dio_intr(struct comedi_device *dev,
 				   unsigned int triggered)
 {
 	struct pcmmio_private *devpriv = dev->private;
+	unsigned int oldevents = s->async->events;
+	unsigned int len = s->async->cmd.chanlist_len;
+	unsigned int val = 0;
 	unsigned long flags;
-	unsigned oldevents;
+	int i;
 
 	spin_lock_irqsave(&devpriv->spinlock, flags);
 
-	oldevents = s->async->events;
+	if (!devpriv->active)
+		goto done;
 
-	if (devpriv->active) {
-		unsigned mytrig = ((triggered >> 0) & ((1 << 24) - 1)) << 0;
-		if (mytrig & devpriv->enabled_mask) {
-			unsigned int val = 0;
-			unsigned int n, ch, len;
+	if (!(triggered & devpriv->enabled_mask))
+		goto done;
+
+	for (i = 0; i < len; i++) {
+		unsigned int chan = CR_CHAN(s->async->cmd.chanlist[i]);
 
-			len = s->async->cmd.chanlist_len;
-			for (n = 0; n < len; n++) {
-				ch = CR_CHAN(s->async->cmd.chanlist[n]);
-				if (mytrig & (1U << ch))
-					val |= (1U << n);
+		if (triggered & (1 << chan))
+			val |= (1 << i);
 	}
+
 	/* Write the scan to the buffer. */
 	if (comedi_buf_put(s->async, val) &&
 	    comedi_buf_put (s->async, val >> 16)) {
@@ -400,9 +402,8 @@ static void pcmmio_handle_dio_intr(struct comedi_device *dev,
 			}
 		}
 	}
-		}
-	}
 
+done:
 	spin_unlock_irqrestore(&devpriv->spinlock, flags);
 
 	if (oldevents != s->async->events)