* [PATCH] iio: dln2-adc: fix iio_triggered_buffer_postenable() position
@ 2019-10-23 8:26 Alexandru Ardelean
2019-10-27 16:56 ` Jonathan Cameron
0 siblings, 1 reply; 4+ messages in thread
From: Alexandru Ardelean @ 2019-10-23 8:26 UTC (permalink / raw)
To: linux-iio, linux-kernel; +Cc: jic23, Alexandru Ardelean
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>
---
drivers/iio/adc/dln2-adc.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
index 5fa78c273a25..65c7c9329b1c 100644
--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -524,6 +524,10 @@ 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 */
@@ -537,6 +541,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
(int)conflict);
ret = -EBUSY;
}
+ iio_triggered_buffer_predisable(indio_dev);
return ret;
}
@@ -550,6 +555,7 @@ 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 {
@@ -557,12 +563,12 @@ 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);
@@ -577,12 +583,14 @@ 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 = {
--
2.20.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: dln2-adc: fix iio_triggered_buffer_postenable() position
2019-10-23 8:26 [PATCH] iio: dln2-adc: fix iio_triggered_buffer_postenable() position Alexandru Ardelean
@ 2019-10-27 16:56 ` Jonathan Cameron
2019-10-29 21:58 ` Jack Andersen
0 siblings, 1 reply; 4+ messages in thread
From: Jonathan Cameron @ 2019-10-27 16:56 UTC (permalink / raw)
To: Alexandru Ardelean; +Cc: linux-iio, linux-kernel, Jack Andersen
On Wed, 23 Oct 2019 11:26:34 +0300
Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:
> 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>
+CC Jack who wrote the driver.
Looks fine to me, but I always like these to sit for a while and ideally get
review from the authors / maintainers of the drivers.
Thanks,
Jonathan
> ---
> drivers/iio/adc/dln2-adc.c | 20 ++++++++++++++------
> 1 file changed, 14 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
> index 5fa78c273a25..65c7c9329b1c 100644
> --- a/drivers/iio/adc/dln2-adc.c
> +++ b/drivers/iio/adc/dln2-adc.c
> @@ -524,6 +524,10 @@ 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 */
> @@ -537,6 +541,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
> (int)conflict);
> ret = -EBUSY;
> }
> + iio_triggered_buffer_predisable(indio_dev);
> return ret;
> }
>
> @@ -550,6 +555,7 @@ 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 {
> @@ -557,12 +563,12 @@ 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);
> @@ -577,12 +583,14 @@ 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 = {
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: dln2-adc: fix iio_triggered_buffer_postenable() position
2019-10-27 16:56 ` Jonathan Cameron
@ 2019-10-29 21:58 ` Jack Andersen
2019-11-02 14:37 ` Jonathan Cameron
0 siblings, 1 reply; 4+ messages in thread
From: Jack Andersen @ 2019-10-29 21:58 UTC (permalink / raw)
To: Jonathan Cameron; +Cc: Alexandru Ardelean, linux-iio, linux-kernel
These changes look fine to me as well.
I no longer have access to a DLN2 for empirical testing, but since this is
mainly integration improvements with the IIO side of things, it shouldn't make
a difference for the hardware.
On Sun, 27 Oct 2019 at 06:56, Jonathan Cameron <jic23@kernel.org> wrote:
>
> On Wed, 23 Oct 2019 11:26:34 +0300
> Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:
>
> > 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>
> +CC Jack who wrote the driver.
>
> Looks fine to me, but I always like these to sit for a while and ideally get
> review from the authors / maintainers of the drivers.
>
> Thanks,
>
> Jonathan
>
> > ---
> > drivers/iio/adc/dln2-adc.c | 20 ++++++++++++++------
> > 1 file changed, 14 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
> > index 5fa78c273a25..65c7c9329b1c 100644
> > --- a/drivers/iio/adc/dln2-adc.c
> > +++ b/drivers/iio/adc/dln2-adc.c
> > @@ -524,6 +524,10 @@ 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 */
> > @@ -537,6 +541,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
> > (int)conflict);
> > ret = -EBUSY;
> > }
> > + iio_triggered_buffer_predisable(indio_dev);
> > return ret;
> > }
> >
> > @@ -550,6 +555,7 @@ 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 {
> > @@ -557,12 +563,12 @@ 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);
> > @@ -577,12 +583,14 @@ 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 = {
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: dln2-adc: fix iio_triggered_buffer_postenable() position
2019-10-29 21:58 ` Jack Andersen
@ 2019-11-02 14:37 ` Jonathan Cameron
0 siblings, 0 replies; 4+ messages in thread
From: Jonathan Cameron @ 2019-11-02 14:37 UTC (permalink / raw)
To: Jack Andersen; +Cc: Alexandru Ardelean, linux-iio, linux-kernel
On Tue, 29 Oct 2019 11:58:16 -1000
Jack Andersen <jackoalan@gmail.com> wrote:
> These changes look fine to me as well.
>
> I no longer have access to a DLN2 for empirical testing, but since this is
> mainly integration improvements with the IIO side of things, it shouldn't make
> a difference for the hardware.
Whilst I have one of these, it'll will be a while before I'm in any position
to test it. Hence let's gamble a tiny bit.
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.
Thanks,
Jonathan
>
>
>
> On Sun, 27 Oct 2019 at 06:56, Jonathan Cameron <jic23@kernel.org> wrote:
> >
> > On Wed, 23 Oct 2019 11:26:34 +0300
> > Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:
> >
> > > 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>
> > +CC Jack who wrote the driver.
> >
> > Looks fine to me, but I always like these to sit for a while and ideally get
> > review from the authors / maintainers of the drivers.
> >
> > Thanks,
> >
> > Jonathan
> >
> > > ---
> > > drivers/iio/adc/dln2-adc.c | 20 ++++++++++++++------
> > > 1 file changed, 14 insertions(+), 6 deletions(-)
> > >
> > > diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
> > > index 5fa78c273a25..65c7c9329b1c 100644
> > > --- a/drivers/iio/adc/dln2-adc.c
> > > +++ b/drivers/iio/adc/dln2-adc.c
> > > @@ -524,6 +524,10 @@ 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 */
> > > @@ -537,6 +541,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
> > > (int)conflict);
> > > ret = -EBUSY;
> > > }
> > > + iio_triggered_buffer_predisable(indio_dev);
> > > return ret;
> > > }
> > >
> > > @@ -550,6 +555,7 @@ 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 {
> > > @@ -557,12 +563,12 @@ 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);
> > > @@ -577,12 +583,14 @@ 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 = {
> >
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-11-02 14:37 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2019-10-23 8:26 [PATCH] iio: dln2-adc: fix iio_triggered_buffer_postenable() position Alexandru Ardelean
2019-10-27 16:56 ` Jonathan Cameron
2019-10-29 21:58 ` Jack Andersen
2019-11-02 14:37 ` Jonathan Cameron
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