[PATCH v3 0/2] iio: adc: ad7779: Remove dead code and redundant error message

[PATCH v3 0/2] iio: adc: ad7779: Remove dead code and redundant error message

[Moksh Panicker]

These two patches address review feedback from Joshua Crofts on the
ad7779 driver.

v3: Fix double blank line left after removing the completion field
v2: Add cover letter; send as fresh thread (not as reply to v1)
v1: Initial submission

Moksh Panicker (2):
  iio: adc: ad7779: Remove unused completion field
  iio: adc: ad7779: Remove redundant dev_err_probe() after
    devm_request_irq()

 drivers/iio/adc/ad7779.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

-- 
2.34.1

[PATCH v3 1/2] iio: adc: ad7779: Remove unused completion field

[Moksh Panicker]

struct ad7779_state contains a completion field that is initialized
in ad7779_setup_without_backend() but never waited on or signaled
anywhere in the driver. Remove the dead code.

Suggested-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Moksh Panicker <mokshpanicker.7@gmail.com>
---
 drivers/iio/adc/ad7779.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/iio/adc/ad7779.c b/drivers/iio/adc/ad7779.c
index 695cc79e78da..c1a99b4c1256 100644
--- a/drivers/iio/adc/ad7779.c
+++ b/drivers/iio/adc/ad7779.c
@@ -143,7 +143,6 @@ struct ad7779_state {
 	const struct ad7779_chip_info *chip_info;
 	struct clk *mclk;
 	struct iio_trigger *trig;
-	struct completion completion;
 	unsigned int sampling_freq;
 	enum ad7779_filter filter_enabled;
 	struct iio_backend *back;
@@ -852,7 +851,6 @@ static int ad7779_setup_without_backend(struct ad7779_state *st, struct iio_dev
 
 	indio_dev->trig = iio_trigger_get(st->trig);
 
-	init_completion(&st->completion);
 
 	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
 					      &iio_pollfunc_store_time,
-- 
2.34.1

[PATCH v3 2/2] iio: adc: ad7779: Remove redundant dev_err_probe() after devm_request_irq()

[Moksh Panicker]

devm_request_irq() already prints an error message on failure via the
IRQ core, so wrapping its return value in dev_err_probe() results in a
duplicate error message. Return the error directly instead.

Suggested-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Moksh Panicker <mokshpanicker.7@gmail.com>
---
 drivers/iio/adc/ad7779.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iio/adc/ad7779.c b/drivers/iio/adc/ad7779.c
index c1a99b4c1256..a5b8bfa99a74 100644
--- a/drivers/iio/adc/ad7779.c
+++ b/drivers/iio/adc/ad7779.c
@@ -842,8 +842,7 @@ static int ad7779_setup_without_backend(struct ad7779_state *st, struct iio_dev
 			       IRQF_NO_THREAD | IRQF_NO_AUTOEN, indio_dev->name,
 			       st->trig);
 	if (ret)
-		return dev_err_probe(dev, ret, "request IRQ %d failed\n",
-				     st->spi->irq);
+		return ret;
 
 	ret = devm_iio_trigger_register(dev, st->trig);
 	if (ret)
-- 
2.34.1

Re: [PATCH v3 1/2] iio: adc: ad7779: Remove unused completion field

[Joshua Crofts]

On Thu,  2 Jul 2026 11:46:48 +0000
Moksh Panicker <mokshpanicker.7@gmail.com> wrote:

> struct ad7779_state contains a completion field that is initialized
> in ad7779_setup_without_backend() but never waited on or signaled
> anywhere in the driver. Remove the dead code.
> 
> Suggested-by: Joshua Crofts <joshua.crofts1@gmail.com>
> Signed-off-by: Moksh Panicker <mokshpanicker.7@gmail.com>
> ---
>  drivers/iio/adc/ad7779.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/iio/adc/ad7779.c b/drivers/iio/adc/ad7779.c
> index 695cc79e78da..c1a99b4c1256 100644
> --- a/drivers/iio/adc/ad7779.c
> +++ b/drivers/iio/adc/ad7779.c
> @@ -143,7 +143,6 @@ struct ad7779_state {
>  	const struct ad7779_chip_info *chip_info;
>  	struct clk *mclk;
>  	struct iio_trigger *trig;
> -	struct completion completion;
>  	unsigned int sampling_freq;
>  	enum ad7779_filter filter_enabled;
>  	struct iio_backend *back;
> @@ -852,7 +851,6 @@ static int ad7779_setup_without_backend(struct ad7779_state *st, struct iio_dev
>  
>  	indio_dev->trig = iio_trigger_get(st->trig);
>  
> -	init_completion(&st->completion);
>  

Remove the blank line here as well.

>  	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
>  					      &iio_pollfunc_store_time,



-- 
Kind regards

CJD

Re: [PATCH v3 2/2] iio: adc: ad7779: Remove redundant dev_err_probe() after devm_request_irq()

[Joshua Crofts]

On Thu,  2 Jul 2026 11:46:49 +0000
Moksh Panicker <mokshpanicker.7@gmail.com> wrote:

> devm_request_irq() already prints an error message on failure via the
> IRQ core, so wrapping its return value in dev_err_probe() results in a
> duplicate error message. Return the error directly instead.
> 
> Suggested-by: Joshua Crofts <joshua.crofts1@gmail.com>
> Signed-off-by: Moksh Panicker <mokshpanicker.7@gmail.com>
> ---
>  drivers/iio/adc/ad7779.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/adc/ad7779.c b/drivers/iio/adc/ad7779.c
> index c1a99b4c1256..a5b8bfa99a74 100644
> --- a/drivers/iio/adc/ad7779.c
> +++ b/drivers/iio/adc/ad7779.c
> @@ -842,8 +842,7 @@ static int ad7779_setup_without_backend(struct ad7779_state *st, struct iio_dev
>  			       IRQF_NO_THREAD | IRQF_NO_AUTOEN, indio_dev->name,
>  			       st->trig);
>  	if (ret)
> -		return dev_err_probe(dev, ret, "request IRQ %d failed\n",
> -				     st->spi->irq);
> +		return ret;
>  
>  	ret = devm_iio_trigger_register(dev, st->trig);
>  	if (ret)

Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>

-- 
Kind regards

CJD

Re: [PATCH v3 1/2] iio: adc: ad7779: Remove unused completion field

[Jonathan Cameron]

On Thu, 2 Jul 2026 13:54:28 +0200
Joshua Crofts <joshua.crofts1@gmail.com> wrote:

> On Thu,  2 Jul 2026 11:46:48 +0000
> Moksh Panicker <mokshpanicker.7@gmail.com> wrote:
> 
> > struct ad7779_state contains a completion field that is initialized
> > in ad7779_setup_without_backend() but never waited on or signaled
> > anywhere in the driver. Remove the dead code.
> > 
> > Suggested-by: Joshua Crofts <joshua.crofts1@gmail.com>
> > Signed-off-by: Moksh Panicker <mokshpanicker.7@gmail.com>
> > ---
> >  drivers/iio/adc/ad7779.c | 2 --
> >  1 file changed, 2 deletions(-)
> > 
> > diff --git a/drivers/iio/adc/ad7779.c b/drivers/iio/adc/ad7779.c
> > index 695cc79e78da..c1a99b4c1256 100644
> > --- a/drivers/iio/adc/ad7779.c
> > +++ b/drivers/iio/adc/ad7779.c
> > @@ -143,7 +143,6 @@ struct ad7779_state {
> >  	const struct ad7779_chip_info *chip_info;
> >  	struct clk *mclk;
> >  	struct iio_trigger *trig;
> > -	struct completion completion;
> >  	unsigned int sampling_freq;
> >  	enum ad7779_filter filter_enabled;
> >  	struct iio_backend *back;
> > @@ -852,7 +851,6 @@ static int ad7779_setup_without_backend(struct ad7779_state *st, struct iio_dev
> >  
> >  	indio_dev->trig = iio_trigger_get(st->trig);
> >  
> > -	init_completion(&st->completion);
> >    
> 
> Remove the blank line here as well.
Fixed up and applied.

> 
> >  	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
> >  					      &iio_pollfunc_store_time,  
> 
> 
> 

Re: [PATCH v3 2/2] iio: adc: ad7779: Remove redundant dev_err_probe() after devm_request_irq()

[Jonathan Cameron]

On Thu, 2 Jul 2026 13:54:54 +0200
Joshua Crofts <joshua.crofts1@gmail.com> wrote:

> On Thu,  2 Jul 2026 11:46:49 +0000
> Moksh Panicker <mokshpanicker.7@gmail.com> wrote:
> 
> > devm_request_irq() already prints an error message on failure via the
> > IRQ core, so wrapping its return value in dev_err_probe() results in a
> > duplicate error message. Return the error directly instead.
> > 
> > Suggested-by: Joshua Crofts <joshua.crofts1@gmail.com>
> > Signed-off-by: Moksh Panicker <mokshpanicker.7@gmail.com>
> > ---
> >  drivers/iio/adc/ad7779.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/drivers/iio/adc/ad7779.c b/drivers/iio/adc/ad7779.c
> > index c1a99b4c1256..a5b8bfa99a74 100644
> > --- a/drivers/iio/adc/ad7779.c
> > +++ b/drivers/iio/adc/ad7779.c
> > @@ -842,8 +842,7 @@ static int ad7779_setup_without_backend(struct ad7779_state *st, struct iio_dev
> >  			       IRQF_NO_THREAD | IRQF_NO_AUTOEN, indio_dev->name,
> >  			       st->trig);
> >  	if (ret)
> > -		return dev_err_probe(dev, ret, "request IRQ %d failed\n",
> > -				     st->spi->irq);
> > +		return ret;
> >  
> >  	ret = devm_iio_trigger_register(dev, st->trig);
> >  	if (ret)  
> 
> Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>
> 
Applied.