staging: comedi: cb_pcidas: use comedi_cmd pointer

Use the local variable to access the comedi_cmd as a pointer instead
of getting to it from the comedi_async pointer.
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/cb_pcidas.c

@@ -1321,7 +1321,7 @@ static void handle_ao_interrupt(struct comedi_device *dev, unsigned int status)
 					       num_points * sizeof(short));
 		num_points = num_bytes / sizeof(short);
 
-		if (async->cmd.stop_src == TRIG_COUNT)
+		if (cmd->stop_src == TRIG_COUNT)
 			devpriv->ao_count -= num_points;
 		/*  write data to board's fifo */
 		outsw(devpriv->ao_registers + DACDATA, devpriv->ao_buffer,
@@ -1343,6 +1343,7 @@ static irqreturn_t cb_pcidas_interrupt(int irq, void *d)
 	struct cb_pcidas_private *devpriv = dev->private;
 	struct comedi_subdevice *s = dev->read_subdev;
 	struct comedi_async *async;
+	struct comedi_cmd *cmd;
 	int status, s5933_status;
 	int half_fifo = thisboard->fifo_size / 2;
 	unsigned int num_samples, i;
@@ -1353,6 +1354,7 @@ static irqreturn_t cb_pcidas_interrupt(int irq, void *d)
 		return IRQ_NONE;
 
 	async = s->async;
+	cmd = &async->cmd;
 
 	s5933_status = inl(devpriv->s5933_config + AMCC_OP_REG_INTCSR);
 
@@ -1375,7 +1377,7 @@ static irqreturn_t cb_pcidas_interrupt(int irq, void *d)
 	if (status & ADHFI) {
 		/*  read data */
 		num_samples = half_fifo;
-		if (async->cmd.stop_src == TRIG_COUNT &&
+		if (cmd->stop_src == TRIG_COUNT &&
 		    num_samples > devpriv->count) {
 			num_samples = devpriv->count;
 		}
@@ -1384,7 +1386,7 @@ static irqreturn_t cb_pcidas_interrupt(int irq, void *d)
 		cfc_write_array_to_buffer(s, devpriv->ai_buffer,
 					  num_samples * sizeof(short));
 		devpriv->count -= num_samples;
-		if (async->cmd.stop_src == TRIG_COUNT && devpriv->count == 0)
+		if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0)
 			async->events |= COMEDI_CB_EOA;
 		/*  clear half-full interrupt latch */
 		spin_lock_irqsave(&dev->spinlock, flags);
@@ -1399,7 +1401,7 @@ static irqreturn_t cb_pcidas_interrupt(int irq, void *d)
 					INT_ADCFIFO)) == 0)
 				break;
 			cfc_write_to_buffer(s, inw(devpriv->adc_fifo));
-			if (async->cmd.stop_src == TRIG_COUNT &&
+			if (cmd->stop_src == TRIG_COUNT &&
 			    --devpriv->count == 0) {
 				/* end of acquisition */
 				async->events |= COMEDI_CB_EOA;