staging: comedi: usbduxfast: remove unreachable code in usbduxfast_ai_cmd()

The (*do_cmdtest) validates that the 'stop_arg' is >= 1 for a 'stop_src'
of TRIG_COUNT and the 'scan_end_arg' is validated to be the 'chanlist_len'
which will always be >= 1. Remove the unreachable error code for an
'ai_sample_count < 1'.

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/usbduxfast.c b/drivers/staging/comedi/drivers/usbduxfast.c
index 376d146..85f9dcf 100644 (file)
--- a/drivers/staging/comedi/drivers/usbduxfast.c
+++ b/drivers/staging/comedi/drivers/usbduxfast.c
@@ -809,18 +809,11 @@ static int usbduxfast_ai_cmd(struct comedi_device *dev,
                up(&devpriv->sem);
                return result;
        }
-       if (cmd->stop_src == TRIG_COUNT) {
+
+       if (cmd->stop_src == TRIG_COUNT)
                devpriv->ai_sample_count = cmd->stop_arg * cmd->scan_end_arg;
-               if (devpriv->ai_sample_count < 1) {
-                       dev_err(dev->class_dev,
-                               "(cmd->stop_arg)*(cmd->scan_end_arg)<1, aborting\n");
-                       up(&devpriv->sem);
-                       return -EFAULT;
-               }
-       } else {
-               /* continous acquisition */
+       else    /* TRIG_NONE */
                devpriv->ai_sample_count = 0;
-       }
 
        if ((cmd->start_src == TRIG_NOW) || (cmd->start_src == TRIG_EXT)) {
                /* enable this acquisition operation */