iio: inkern: add out of range error message
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@i2se.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 21655fd..2800b80 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -116,8 +116,11 @@
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];
}