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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>
This commit is contained in:
Stefan Wahren 2015-01-01 18:13:24 +00:00 committed by Jonathan Cameron
parent 4193c0f1d8
commit 1f202725b7
1 changed files with 4 additions and 1 deletions
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5
drivers/iio/inkern.c
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@ -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];
}