Move this check from the (*do_cmd) to the (*do_cmdtest).
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/usbduxfast.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/comedi/drivers/usbduxfast.c b/drivers/staging/comedi/drivers/usbduxfast.c
index 45060b9..407f091 100644
--- a/drivers/staging/comedi/drivers/usbduxfast.c
+++ b/drivers/staging/comedi/drivers/usbduxfast.c
@@ -389,6 +389,11 @@ static int usbduxfast_ai_cmdtest(struct comedi_device *dev,
if (cmd->start_src == TRIG_EXT && cmd->stop_src == TRIG_EXT)
err |= -EINVAL;
+ /* external start trigger is only valid for 1 or 16 channels */
+ if (cmd->start_src == TRIG_EXT &&
+ cmd->chanlist_len != 1 && cmd->chanlist_len != 16)
+ err |= -EINVAL;
+
if (err)
return 2;
@@ -519,13 +524,6 @@ static int usbduxfast_ai_cmd(struct comedi_device *dev,
up(&devpriv->sem);
return -EINVAL;
}
- if ((cmd->start_src == TRIG_EXT) && (cmd->chanlist_len != 1)
- && (cmd->chanlist_len != 16)) {
- dev_err(dev->class_dev,
- "TRIG_EXT only with 1 or 16 channels possible\n");
- up(&devpriv->sem);
- return -EINVAL;
- }
switch (cmd->chanlist_len) {
case 1:
--
2.4.3
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