This driver supports cmd->start_src sources of TRIG_NOW and TRIG_EXT.
Refactor the (*do_cmdtest) to clarify the trivial validation of the
cmd->start_arg.
This also fixes a bug, the cmd->start_src has the trigger not the
cmd->start_arg.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/ni_labpc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c
index f80ca32..fc9d314 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -649,8 +649,14 @@ static int labpc_ai_cmdtest(struct comedi_device *dev,
/* Step 3: check if arguments are trivially valid */
- if (cmd->start_arg == TRIG_NOW)
+ switch (cmd->start_src) {
+ case TRIG_NOW:
err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
+ break;
+ case TRIG_EXT:
+ /* start_arg value is ignored */
+ break;
+ }
if (!cmd->chanlist_len)
err |= -EINVAL;
--
1.8.5.2
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