On Tue, 5 Sep 2017 17:20:57 +0200
Lars-Peter Clausen <lars@xxxxxxxxxx> wrote:
> On 09/05/2017 04:34 PM, Lars-Peter Clausen wrote:
> > From: Matt Fornero <matt.fornero@xxxxxxxxxxxxx>
> >
> > If an IIO device returns an error code for a read access via debugfs, it
> > is currently ignored by the IIO core (other than emitting an error
> > message). Instead, return this error code to user space, so upper layers
> > can detect it correctly.
> >
> > Signed-off-by: Matt Fornero <matt.fornero@xxxxxxxxxxxxx>
>
> Sorry, this should also have had:
>
> Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
>
Applied to the fixes-togreg branch of iio.git and marked for stable.
Thanks,
Jonathan
> > ---
> > drivers/iio/industrialio-core.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> > index 7a5aa127c52e..9c4cfd19b739 100644
> > --- a/drivers/iio/industrialio-core.c
> > +++ b/drivers/iio/industrialio-core.c
> > @@ -310,8 +310,10 @@ static ssize_t iio_debugfs_read_reg(struct file *file, char __user *userbuf,
> > ret = indio_dev->info->debugfs_reg_access(indio_dev,
> > indio_dev->cached_reg_addr,
> > 0, &val);
> > - if (ret)
> > + if (ret) {
> > dev_err(indio_dev->dev.parent, "%s: read failed\n", __func__);
> > + return ret;
> > + }
> >
> > len = snprintf(buf, sizeof(buf), "0x%X\n", val);
> >
> >
>
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