[PATCH 13/23] staging: comedi: ni_at_a2150: use comedi_fc helpers to validate timer arg

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Use the comedi_fc helper cfc_check_trigger_arg_is() to validate the
trigger argument when the source is TRIG_TIMER.

All the arguments are unsigned int, change the local variable to an
unsigned int and rename it for aesthetic reasons.

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/staging/comedi/drivers/ni_at_a2150.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/comedi/drivers/ni_at_a2150.c b/drivers/staging/comedi/drivers/ni_at_a2150.c
index f8d6bfc..5bd19494 100644
--- a/drivers/staging/comedi/drivers/ni_at_a2150.c
+++ b/drivers/staging/comedi/drivers/ni_at_a2150.c
@@ -334,7 +334,7 @@ static int a2150_ai_cmdtest(struct comedi_device *dev,
 {
 	const struct a2150_board *thisboard = comedi_board(dev);
 	int err = 0;
-	int tmp;
+	unsigned int arg;
 
 	/* Step 1 : check if triggers are trivially valid */
 
@@ -379,10 +379,9 @@ static int a2150_ai_cmdtest(struct comedi_device *dev,
 	/* step 4: fix up any arguments */
 
 	if (cmd->scan_begin_src == TRIG_TIMER) {
-		tmp = cmd->scan_begin_arg;
-		a2150_get_timing(dev, &cmd->scan_begin_arg, cmd->flags);
-		if (tmp != cmd->scan_begin_arg)
-			err++;
+		arg = cmd->scan_begin_arg;
+		a2150_get_timing(dev, &arg, cmd->flags);
+		err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
 	}
 
 	if (err)
-- 
1.9.2

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