iio: buffer: initialize masklength accumulator to 0

Since masklength is marked as [INTERN], no drivers should assign it and
the value will always be 0. Therefore, the local ml accumulator variable
in iio_buffers_alloc_sysfs_and_mask() will always start out as 0.

This changes the code to explicitly set ml to 0 to make it clear that
drivers should not be trying to override the masklength field.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20240425-b4-iio-masklength-cleanup-v1-3-d3d16318274d@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 1d950a3e153b8a97603c883dca1773125a4eba5d..cec58a604d73a93b46dd4e2c5a64c92d1d4f31ab 100644 (file)
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -1744,7 +1744,7 @@ int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
 
        channels = indio_dev->channels;
        if (channels) {
-               int ml = indio_dev->masklength;
+               int ml = 0;
 
                for (i = 0; i < indio_dev->num_channels; i++)
                        ml = max(ml, channels[i].scan_index + 1);