Hi Sanchayan,

On 2015-08-21 06:26, Sanchayan Maity wrote:

+static int vf50_ts_probe(struct platform_device *pdev)
+{
+	struct input_dev *input;
+	struct iio_channel *channels;
+	struct device *dev = &pdev->dev;
+	struct vf50_touch_device *touchdev;
+	int error;
+
+	channels = iio_channel_get_all(dev);
+	if (IS_ERR(channels))
+		return PTR_ERR(channels);

Hm, we expect here that four channels are returned, however a faulty
device tree could contain less. Access to the fourth channel above would
lead to a bug.

Can you check the amount of channels returned? The returned list is
explicitly terminated with a null entry, you can rely on that. Something
similar to hwmon should do the job.
http://lxr.free-electrons.com/source/drivers/hwmon/iio_hwmon.c#L86


Otherwise, Acked-by: Stefan Agner [off-list ref]

--
Stefan