staging: comedi: pcl711: use comedi_fc helpers to validate timer arg

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@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/pcl711.c b/drivers/staging/comedi/drivers/pcl711.c
index ef3ebee..d879052 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl711.c
+++ b/drivers/staging/comedi/drivers/pcl711.c
@@ -295,8 +295,8 @@ static int pcl711_ai_cmdtest(struct comedi_device *dev,
                             struct comedi_subdevice *s, struct comedi_cmd *cmd)
 {
        struct pcl711_private *devpriv = dev->private;
-       int tmp;
        int err = 0;
+       unsigned int arg;
 
        /* Step 1 : check if triggers are trivially valid */
 
@@ -344,14 +344,12 @@ static int pcl711_ai_cmdtest(struct comedi_device *dev,
        /* step 4 */
 
        if (cmd->scan_begin_src == TRIG_TIMER) {
-               tmp = cmd->scan_begin_arg;
+               arg = cmd->scan_begin_arg;
                i8253_cascade_ns_to_timer(I8254_OSC_BASE_2MHZ,
                                          &devpriv->divisor1,
                                          &devpriv->divisor2,
-                                         &cmd->scan_begin_arg,
-                                         cmd->flags);
-               if (tmp != cmd->scan_begin_arg)
-                       err++;
+                                         &arg, cmd->flags);
+               err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
        }
 
        if (err)