staging: comedi: ni_pcidio: use cfc_check_trigger_arg_*() helpers

Use the new helpers in the step 3 tests of ni_pcidio_cmdtest().
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/ni_pcidio.c

@@ -715,46 +715,32 @@ static int ni_pcidio_cmdtest(struct comedi_device *dev,
 	if (err)
 		return 2;
 
-	/* step 3: make sure arguments are trivially compatible */
+	/* Step 3: check if arguments are trivially valid */
+
+	err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
 
-	if (cmd->start_arg != 0) {
-		/* same for both TRIG_INT and TRIG_NOW */
-		cmd->start_arg = 0;
-		err++;
-	}
 #define MAX_SPEED	(TIMER_BASE)	/* in nanoseconds */
 
 	if (cmd->scan_begin_src == TRIG_TIMER) {
-		if (cmd->scan_begin_arg < MAX_SPEED) {
-			cmd->scan_begin_arg = MAX_SPEED;
-			err++;
-		}
+		err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
+						 MAX_SPEED);
 		/* no minimum speed */
 	} else {
 		/* TRIG_EXT */
 		/* should be level/edge, hi/lo specification here */
 		if ((cmd->scan_begin_arg & ~(CR_EDGE | CR_INVERT)) != 0) {
 			cmd->scan_begin_arg &= (CR_EDGE | CR_INVERT);
-			err++;
+			err |= -EINVAL;
 		}
 	}
-	if (cmd->convert_arg != 0) {
-		cmd->convert_arg = 0;
-		err++;
-	}
 
-	if (cmd->scan_end_arg != cmd->chanlist_len) {
-		cmd->scan_end_arg = cmd->chanlist_len;
-		err++;
-	}
+	err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
+	err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
+
 	if (cmd->stop_src == TRIG_COUNT) {
 		/* no limit */
-	} else {
-		/* TRIG_NONE */
-		if (cmd->stop_arg != 0) {
-			cmd->stop_arg = 0;
-			err++;
-		}
+	} else {	/* TRIG_NONE */
+		err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
 	}
 
 	if (err)