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iio: fix config watermark initial value 

config structure is set to 0 when updating the buffers, so by
default config->watermark will be 0. When computing the minimum
between config->watermark and the buffer->watermark or
insert_buffer-watermark, this will always be 0 regardless of the
value set by the user for the buffer.

Set as initial value for config->watermark the maximum allowed
value so that the minimum value will always be set from one of the
buffers.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Fixes: f0566c0c40 ("iio: Set device watermark based on watermark of all
attached buffers")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Irina Tirdea 2016-03-24 11:09:45 +02:00 committed by Jonathan Cameron
parent b74fccad75
commit 1bef2c1d4e
1 changed files with 1 additions and 0 deletions
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drivers/iio/industrialio-buffer.c
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@ -653,6 +653,7 @@ static int iio_verify_update(struct iio_dev *indio_dev,
unsigned int modes;
memset(config, 0, sizeof(*config));
config->watermark = ~0;
/*
* If there is just one buffer and we are removing it there is nothing