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iio:iio_buffer_init(): Only set watermark if not already set

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Only initialize the watermark field if it is still 0. This allows drivers
to provide a custom default watermark value. E.g. some driver might have a
fixed watermark or can only support watermarks within a certain range and
the initial value for the watermark should be within this range.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2015-10-13 18:10:25 +02:00 committed by Jonathan Cameron
parent f0566c0c40
commit 4a60535726
1 changed files with 2 additions and 1 deletions
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3
drivers/iio/industrialio-buffer.c
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@ -193,7 +193,8 @@ void iio_buffer_init(struct iio_buffer *buffer)
INIT_LIST_HEAD(&buffer->buffer_list);
init_waitqueue_head(&buffer->pollq);
kref_init(&buffer->ref);
buffer->watermark = 1;
if (!buffer->watermark)
buffer->watermark = 1;
}
EXPORT_SYMBOL(iio_buffer_init);