[PATCH] iio: adc: ti-ads1119: Reinit completion before wait_for_completion_timeout()

[PATCH] iio: adc: ti-ads1119: Reinit completion before wait_for_completion_timeout()

[Felix Gu]

The completion is not reinit before wait_for_completion_timeout(),
so wait_for_completion_timeout() will return immediately after
the first successful completion.

Fixes: a9306887eba4 ("iio: adc: ti-ads1119: Add driver")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
---
 drivers/iio/adc/ti-ads1119.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/adc/ti-ads1119.c b/drivers/iio/adc/ti-ads1119.c
index c9cedc59cdcd..75dbb469fa27 100644
--- a/drivers/iio/adc/ti-ads1119.c
+++ b/drivers/iio/adc/ti-ads1119.c
@@ -276,6 +276,9 @@ static int ads1119_single_conversion(struct ads1119_state *st,
 	if (ret)
 		goto pdown;
 
+	if (st->client->irq)
+		reinit_completion(&st->completion);
+
 	ret = ads1119_configure_channel(st, mux, gain, datarate);
 	if (ret)
 		goto pdown;

---
base-commit: 3fa5e5702a82d259897bd7e209469bc06368bf31
change-id: 20260303-ti-ads1119-1-cc68e3c01783

Best regards,
-- 
Felix Gu <ustc.gu@gmail.com>

Re: [PATCH] iio: adc: ti-ads1119: Reinit completion before wait_for_completion_timeout()

[Jonathan Cameron]

On Tue, 03 Mar 2026 00:48:45 +0800
Felix Gu <ustc.gu@gmail.com> wrote:

> The completion is not reinit before wait_for_completion_timeout(),
> so wait_for_completion_timeout() will return immediately after
> the first successful completion.
> 
> Fixes: a9306887eba4 ("iio: adc: ti-ads1119: Add driver")
> Signed-off-by: Felix Gu <ustc.gu@gmail.com>
I agree there is a bug here but a question inline.
> ---
>  drivers/iio/adc/ti-ads1119.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/iio/adc/ti-ads1119.c b/drivers/iio/adc/ti-ads1119.c
> index c9cedc59cdcd..75dbb469fa27 100644
> --- a/drivers/iio/adc/ti-ads1119.c
> +++ b/drivers/iio/adc/ti-ads1119.c
> @@ -276,6 +276,9 @@ static int ads1119_single_conversion(struct ads1119_state *st,
>  	if (ret)
>  		goto pdown;
>  
> +	if (st->client->irq)
> +		reinit_completion(&st->completion);
> +
What's the reason for doing here rather than a few lines later.
That is before this
ret = i2c_smbus_write_byte(st->client, ADS1119_CMD_START_SYNC);
which the  naming suggests kicks of the actual channel capture?

Jonathan

>  	ret = ads1119_configure_channel(st, mux, gain, datarate);
>  	if (ret)
>  		goto pdown;
> 
> ---
> base-commit: 3fa5e5702a82d259897bd7e209469bc06368bf31
> change-id: 20260303-ti-ads1119-1-cc68e3c01783
> 
> Best regards,

Re: [PATCH] iio: adc: ti-ads1119: Reinit completion before wait_for_completion_timeout()

[Felix Gu]

> What's the reason for doing here rather than a few lines later.
> That is before this
> ret = i2c_smbus_write_byte(st->client, ADS1119_CMD_START_SYNC);
> which the  naming suggests kicks of the actual channel capture?
>
> Jonathan
>
Hi Jonathan,

I think both positions are fine, but the one you mentioned is more precise.
I will update it in V2.

Best regards,
Felix