diff options
| author | Paul Cercueil <paul@crapouillou.net> | 2021-06-18 13:30:04 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-07-19 09:51:59 +0100 |
| commit | 0e0761f86f10253425edac56df9950c172b923ea (patch) | |
| tree | 4aba4800d82fb01f5714be966c860d23123d2175 /drivers/iio/industrialio-core.c | |
| parent | e46a36d92da0ded4e8519bc46912edc0d5a9f4a7 (diff) | |
iio: core: Forbid use of both labels and extended names
Extended names are a problem for user-space as they make the filenames
in sysfs sometimes not parsable. They are now deprecated in favor of
labels.
This change makes sure that a device driver won't provide both labels
and extended names for its channels. It has never been the case and we
don't want it to happen.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20210618123005.49867-2-paul@crapouillou.net
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/industrialio-core.c')
| -rw-r--r-- | drivers/iio/industrialio-core.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 6d2175eb7af2..7e3c92efdfa0 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -1858,6 +1858,24 @@ static int iio_check_unique_scan_index(struct iio_dev *indio_dev) return 0; } +static int iio_check_extended_name(const struct iio_dev *indio_dev) +{ + unsigned int i; + + if (!indio_dev->info->read_label) + return 0; + + for (i = 0; i < indio_dev->num_channels; i++) { + if (indio_dev->channels[i].extend_name) { + dev_err(&indio_dev->dev, + "Cannot use labels and extend_name at the same time\n"); + return -EINVAL; + } + } + + return 0; +} + static const struct iio_buffer_setup_ops noop_ring_setup_ops; int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod) @@ -1882,6 +1900,10 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod) if (ret < 0) return ret; + ret = iio_check_extended_name(indio_dev); + if (ret < 0) + return ret; + iio_device_register_debugfs(indio_dev); ret = iio_buffers_alloc_sysfs_and_mask(indio_dev); |