From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Thu, 1 Jan 2015 18:13:24 +0000 (+0000)
Subject: iio: inkern: add out of range error message
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1f202725b70c3d6dc736904a0d1b77a5faed6690;p=linux-beck.git

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 21655fd1465c..2800b80ea990 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];
 }