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authorLars-Peter Clausen <lars@metafoo.de>2012-06-18 18:33:47 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-18 17:26:09 -0700
commitf5b81ddd12da71bd00b2963203c23ff929e0c182 (patch)
treeae0d93635fc5f5d98d1192f5993e6d7fa8988849 /drivers/iio
parent493b67b73c7f575058acec61903a2cb128207106 (diff)
downloadop-kernel-dev-f5b81ddd12da71bd00b2963203c23ff929e0c182.zip
op-kernel-dev-f5b81ddd12da71bd00b2963203c23ff929e0c182.tar.gz
iio: iio_buffer_register: Skip channels with negative scan index
It is not always the case that all channels can be used in buffered mode. This patch allows channels, which can not be used in buffered mode, to set their scan index to a negative number, which will cause iio_buffer_register to ignore the channel. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/industrialio-buffer.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 2f35db9..3d8d187 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -285,6 +285,9 @@ int iio_buffer_register(struct iio_dev *indio_dev,
if (channels) {
/* new magic */
for (i = 0; i < num_channels; i++) {
+ if (channels[i].scan_index < 0)
+ continue;
+
/* Establish necessary mask length */
if (channels[i].scan_index >
(int)indio_dev->masklength - 1)
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