linux-kernel - Re: [PATCH] tty: serdev: using pm_runtime_resume_and_get instead of pm_runtime_get

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Date:   Wed, 20 Apr 2022 10:21:14 +0200
From:   Johan Hovold <johan@...nel.org>
To:     cgel.zte@...il.com
Cc:     robh@...nel.org, gregkh@...uxfoundation.org, jirislaby@...nel.org,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] tty: serdev: using pm_runtime_resume_and_get instead of
 pm_runtime_get_sync

On Mon, Apr 18, 2022 at 11:06:35AM +0000, cgel.zte@...il.com wrote:
> From: Minghao Chi <chi.minghao@....com.cn>
> 
> Using pm_runtime_resume_and_get is more appropriate
> for simplifing code
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@....com.cn>
> ---
>  drivers/tty/serdev/core.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
> index 0180e1e4e75d..e550ad3e7f2b 100644
> --- a/drivers/tty/serdev/core.c
> +++ b/drivers/tty/serdev/core.c
> @@ -156,11 +156,9 @@ int serdev_device_open(struct serdev_device *serdev)
>  	if (ret)
>  		return ret;
>  
> -	ret = pm_runtime_get_sync(&ctrl->dev);
> -	if (ret < 0) {
> -		pm_runtime_put_noidle(&ctrl->dev);
> +	ret = pm_runtime_resume_and_get(&ctrl->dev);
> +	if (ret < 0)
>  		goto err_close;
> -	}

As the author of this piece of the code, I prefer using the traditional
API consistently rather than mixing in the new helper that uses a
different naming scheme.

No need to change this.

>  
>  	return 0;

Johan