If the DT contains an invalid channel specifier then the probe of
iio_hwmon fails with the following message:
iio_hwmon: probe of iio_hwmon failed with error -22
So it's better to print out the relevant channel specifier in
error case to locate the problem.
Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
---
drivers/iio/inkern.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 866fe90..30a8d9c 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -116,8 +116,11 @@ static int __of_iio_simple_xlate(struct iio_dev *indio_dev,
if (!iiospec->args_count)
return 0;
- if (iiospec->args[0] >= indio_dev->num_channels)
+ if (iiospec->args[0] >= indio_dev->num_channels) {
+ dev_err(&indio_dev->dev, "invalid channel index %u\n",
+ iiospec->args[0]);
return -EINVAL;
+ }
return iiospec->args[0];
}
--
1.7.9.5
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