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>
> ---
> 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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