On 15-08-22 18:52:28, Stefan Agner wrote:
> 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
I agree. It did be nice to have this error check. Thanks. I will add
this check so we can bail out if less channels are specified.
- Sanchayan.
>
>
> Otherwise, Acked-by: Stefan Agner <stefan@xxxxxxxx>
>
> --
> Stefan
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