Even if no userspace consumer buffer is attached to the IIO device at
registration we still need to compute the masklength, since it is possible
that a in-kernel consumer buffer is going to get attached to the device at
a later point.
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
drivers/iio/industrialio-buffer.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 1129125..a72db00 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -968,6 +968,15 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
int ret, i, attrn, attrcount, attrcount_orig = 0;
const struct iio_chan_spec *channels;
+ channels = indio_dev->channels;
+ if (channels) {
+ int ml = indio_dev->masklength;
+
+ for (i = 0; i < indio_dev->num_channels; i++)
+ ml = max(ml, channels[i].scan_index + 1);
+ indio_dev->masklength = ml;
+ }
+
if (!buffer)
return 0;
@@ -1011,12 +1020,6 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
if (channels[i].scan_index < 0)
continue;
- /* Establish necessary mask length */
- if (channels[i].scan_index >
- (int)indio_dev->masklength - 1)
- indio_dev->masklength
- = channels[i].scan_index + 1;
-
ret = iio_buffer_add_channel_sysfs(indio_dev,
&channels[i]);
if (ret < 0)
--
2.1.4
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
