linux-kernel - Re: [PATCH] iio: adc: xilinx-ams: Use devm_delayed_work

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Message-ID: <20220220114552.53fedd33@jic23-huawei>
Date:   Sun, 20 Feb 2022 11:45:52 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Anand Ashok Dumbre <anand.ashok.dumbre@...inx.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michal Simek <michal.simek@...inx.com>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] iio: adc: xilinx-ams: Use
 devm_delayed_work_autocancel() to simplify code

On Sun, 13 Feb 2022 19:29:05 +0100
Christophe JAILLET <christophe.jaillet@...adoo.fr> wrote:

> Use devm_delayed_work_autocancel() instead of hand writing it. This is
> less verbose and saves a few lines of code.
> 
> devm_delayed_work_autocancel() uses devm_add_action() instead of
> devm_add_action_or_reset(). This is fine, because if the underlying memory
> allocation fails, no work has been scheduled yet. So there is nothing to
> undo.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Looks good to me, but I'd ideally like some input from someone familiar with
the driver.

Thanks,

Jonathan

> ---
>  drivers/iio/adc/xilinx-ams.c | 11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iio/adc/xilinx-ams.c b/drivers/iio/adc/xilinx-ams.c
> index 8343c5f74121..6ffddf4038b8 100644
> --- a/drivers/iio/adc/xilinx-ams.c
> +++ b/drivers/iio/adc/xilinx-ams.c
> @@ -12,6 +12,7 @@
>  #include <linux/bitfield.h>
>  #include <linux/clk.h>
>  #include <linux/delay.h>
> +#include <linux/devm-helpers.h>
>  #include <linux/interrupt.h>
>  #include <linux/io.h>
>  #include <linux/iopoll.h>
> @@ -1348,11 +1349,6 @@ static void ams_clk_disable_unprepare(void *data)
>  	clk_disable_unprepare(data);
>  }
>  
> -static void ams_cancel_delayed_work(void *data)
> -{
> -	cancel_delayed_work(data);
> -}
> -
>  static int ams_probe(struct platform_device *pdev)
>  {
>  	struct iio_dev *indio_dev;
> @@ -1389,9 +1385,8 @@ static int ams_probe(struct platform_device *pdev)
>  	if (ret < 0)
>  		return ret;
>  
> -	INIT_DELAYED_WORK(&ams->ams_unmask_work, ams_unmask_worker);
> -	ret = devm_add_action_or_reset(&pdev->dev, ams_cancel_delayed_work,
> -				       &ams->ams_unmask_work);
> +	ret = devm_delayed_work_autocancel(&pdev->dev, &ams->ams_unmask_work,
> +					   ams_unmask_worker);
>  	if (ret < 0)
>  		return ret;
>