diff options
| author | Alexandru Ardelean <alexandru.ardelean@analog.com> | 2019-10-23 11:26:34 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 12:37:19 +0100 |
| commit | 07debac18a320bd85c7b0e09f5d2daef5e4d0bb9 (patch) | |
| tree | e3e97deca30c42e7c7df8f78f4c3d3e3e16e9c0e /drivers/iio | |
| parent | 8f143cafa6f7b620923851a7c1a5442a44503b83 (diff) | |
iio: dln2-adc: fix iio_triggered_buffer_postenable() position
[ Upstream commit a7bddfe2dfce1d8859422124abe1964e0ecd386e ]
The iio_triggered_buffer_postenable() hook should be called first to
attach the poll function. The iio_triggered_buffer_predisable() hook is
called last (as is it should).
This change moves iio_triggered_buffer_postenable() to be called first. It
adds iio_triggered_buffer_predisable() on the error paths of the postenable
hook.
For the predisable hook, some code-paths have been changed to make sure
that the iio_triggered_buffer_predisable() hook gets called in case there
is an error before it.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/dln2-adc.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c index ab8d6aed5085..2a299bbd6acf 100644 --- a/drivers/iio/adc/dln2-adc.c +++ b/drivers/iio/adc/dln2-adc.c @@ -528,6 +528,10 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev) u16 conflict; unsigned int trigger_chan; + ret = iio_triggered_buffer_postenable(indio_dev); + if (ret) + return ret; + mutex_lock(&dln2->mutex); /* Enable ADC */ @@ -541,6 +545,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev) (int)conflict); ret = -EBUSY; } + iio_triggered_buffer_predisable(indio_dev); return ret; } @@ -554,6 +559,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev) mutex_unlock(&dln2->mutex); if (ret < 0) { dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__); + iio_triggered_buffer_predisable(indio_dev); return ret; } } else { @@ -561,12 +567,12 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev) mutex_unlock(&dln2->mutex); } - return iio_triggered_buffer_postenable(indio_dev); + return 0; } static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev) { - int ret; + int ret, ret2; struct dln2_adc *dln2 = iio_priv(indio_dev); mutex_lock(&dln2->mutex); @@ -581,12 +587,14 @@ static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev) ret = dln2_adc_set_port_enabled(dln2, false, NULL); mutex_unlock(&dln2->mutex); - if (ret < 0) { + if (ret < 0) dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__); - return ret; - } - return iio_triggered_buffer_predisable(indio_dev); + ret2 = iio_triggered_buffer_predisable(indio_dev); + if (ret == 0) + ret = ret2; + + return ret; } static const struct iio_buffer_setup_ops dln2_adc_buffer_setup_ops = { |