Step 5 of the (*do_cmdtest) validates that the cmd->chanlist is compatible
with the hardware.
For aesthetics, factor out the step 5 code for the async command support. Tidy
up the factored out code.
To minimize the noise, change the dev_err() to dev_dbg().
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/gsc_hpdi.c | 34 ++++++++++++++++++++-----------
1 file changed, 22 insertions(+), 12 deletions(-)
diff --git a/drivers/staging/comedi/drivers/gsc_hpdi.c
b/drivers/staging/comedi/drivers/gsc_hpdi.c
index 08d7655..bae4e97 100644
--- a/drivers/staging/comedi/drivers/gsc_hpdi.c
+++ b/drivers/staging/comedi/drivers/gsc_hpdi.c
@@ -360,12 +360,30 @@ static int gsc_hpdi_cmd(struct comedi_device *dev,
return 0;
}
+static int gsc_hpdi_check_chanlist(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ int i;
+
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ unsigned int chan = CR_CHAN(cmd->chanlist[i]);
+
+ if (chan != i) {
+ dev_dbg(dev->class_dev,
+ "chanlist must be ch 0 to 31 in order\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int gsc_hpdi_cmd_test(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd)
{
int err = 0;
- int i;
if (s->io_bits)
return -EINVAL;
@@ -411,17 +429,9 @@ static int gsc_hpdi_cmd_test(struct comedi_device *dev,
if (err)
return 4;
- /* step 5: complain about special chanlist considerations */
-
- for (i = 0; i < cmd->chanlist_len; i++) {
- if (CR_CHAN(cmd->chanlist[i]) != i) {
- /* XXX could support 8 or 16 channels */
- dev_err(dev->class_dev,
- "chanlist must be ch 0 to 31 in order");
- err |= -EINVAL;
- break;
- }
- }
+ /* Step 5: check channel list if it exists */
+ if (cmd->chanlist && cmd->chanlist_len > 0)
+ err |= gsc_hpdi_check_chanlist(dev, s, cmd);
if (err)
return 5;
--
1.8.5.2
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