linux-kernel - Re: [PATCH 36/78] media: i2c: imx334: use pm_runtime_resume_and

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Date:   Mon, 26 Apr 2021 09:06:54 +0000
From:   "Alessandrelli, Daniele" <daniele.alessandrelli@...el.com>
To:     "mchehab+huawei@...nel.org" <mchehab+huawei@...nel.org>
CC:     "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "Krasteva, MartinaX" <martinax.krasteva@...el.com>,
        "linuxarm@...wei.com" <linuxarm@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Murphy, Paul J" <paul.j.murphy@...el.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "mauro.chehab@...wei.com" <mauro.chehab@...wei.com>,
        "Rosikopulos, GjorgjiX" <gjorgjix.rosikopulos@...el.com>
Subject: Re: [PATCH 36/78] media: i2c: imx334: use pm_runtime_resume_and_get()

Hi Mauro,

Thanks for the patch.

On Sat, 2021-04-24 at 08:44 +0200, Mauro Carvalho Chehab wrote:
> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to
> deal with usage counter")
> added pm_runtime_resume_and_get() in order to automatically handle
> dev->power.usage_count decrement on errors.
> 
> Use the new API, in order to cleanup the error check logic.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
>  drivers/media/i2c/imx334.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/i2c/imx334.c b/drivers/media/i2c/imx334.c
> index 047aa7658d21..a5a03bb4a6ae 100644
> --- a/drivers/media/i2c/imx334.c
> +++ b/drivers/media/i2c/imx334.c
> @@ -717,9 +717,9 @@ static int imx334_set_stream(struct v4l2_subdev
> *sd, int enable)
>  	}
>  
>  	if (enable) {
> -		ret = pm_runtime_get_sync(imx334->dev);
> +		ret = pm_runtime_resume_and_get(imx334->dev);
>  		if (ret)
> -			goto error_power_off;
> +			goto error_unlock;
>  
>  		ret = imx334_start_streaming(imx334);
>  		if (ret)
> @@ -737,6 +737,7 @@ static int imx334_set_stream(struct v4l2_subdev
> *sd, int enable)
>  
>  error_power_off:
>  	pm_runtime_put(imx334->dev);
> +error_unlock:
>  	mutex_unlock(&imx334->mutex);
>  
>  	return ret;

Looks good to me.

Reviewed-by: Daniele Alessandrelli <daniele.alessandrelli@...el.com>