linux-kernel - Re: [PATCH v2] iio: trigger: stm32-lptimer-trigger: remove unneeded platform_set

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Date:   Sat, 5 Aug 2023 19:30:52 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Andrei Coardos <aboutphysycs@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-iio@...r.kernel.org, alexandre.torgue@...s.st.com,
        mcoquelin.stm32@...il.com, lars@...afoo.de,
        Alexandru Ardelean <alex@...uggie.ro>
Subject: Re: [PATCH v2] iio: trigger: stm32-lptimer-trigger: remove unneeded
 platform_set_drvdata()

On Wed,  2 Aug 2023 16:35:09 +0300
Andrei Coardos <aboutphysycs@...il.com> wrote:

> This function call was found to be unnecessary as there is no equivalent
> platform_get_drvdata() call to access the private data of the driver. Also,
> the private data is defined in this driver, so there is no risk of it being
> accessed outside of this driver file.
> 
> Reviewed-by: Alexandru Ardelean <alex@...uggie.ro>
> Signed-off-by: Andrei Coardos <aboutphysycs@...il.com>
> ---
> 
> Changelog V1->V2:
> 
> * https://lore.kernel.org/linux-iio/CAH3L5QpuoDYU6qvWH7_z5Yx0cW2qPMbCA8AFEYAPsiEkSzCiwQ@mail.gmail.com/T/#t
> * Adjusted the returning values of the function
> 
> 
>  drivers/iio/trigger/stm32-lptimer-trigger.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/iio/trigger/stm32-lptimer-trigger.c b/drivers/iio/trigger/stm32-lptimer-trigger.c
> index df2416e33375..ab1cc6a05f26 100644
> --- a/drivers/iio/trigger/stm32-lptimer-trigger.c
> +++ b/drivers/iio/trigger/stm32-lptimer-trigger.c
> @@ -88,11 +88,7 @@ static int stm32_lptim_trigger_probe(struct platform_device *pdev)
>  	priv->dev = &pdev->dev;
>  	priv->trg = stm32_lptim_triggers[index];
>  
> -	ret = stm32_lptim_setup_trig(priv);
> -	if (ret)
> -		return ret;
> -
> -	return 0;
> +	return stm32_lptim_setup_trig(priv);
Both of us failed to notice ret isn't used any more.  Anyhow, I cleaned that
up after spotting the build warning.

Jonathan

>  }
>  
>  static const struct of_device_id stm32_lptim_trig_of_match[] = {