linux-kernel - Re: [PATCH 20/25] media: sti/delta: use pm_runtime_resume_and

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Date:   Wed, 5 May 2021 13:33:46 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
CC:     <linuxarm@...wei.com>, <mauro.chehab@...wei.com>,
        Hugues Fruchet <hugues.fruchet@...s.st.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>
Subject: Re: [PATCH 20/25] media: sti/delta: use pm_runtime_resume_and_get()

On Wed, 5 May 2021 13:01:58 +0100
Jonathan Cameron <Jonathan.Cameron@...wei.com> wrote:

> On Wed, 5 May 2021 11:42:10 +0200
> Mauro Carvalho Chehab <mchehab+huawei@...nel.org> 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>  
> Trivial thing inline otherwise fine.
> 
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> > ---
> >  drivers/media/platform/sti/delta/delta-v4l2.c | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> > 
> > diff --git a/drivers/media/platform/sti/delta/delta-v4l2.c b/drivers/media/platform/sti/delta/delta-v4l2.c
> > index c691b3d81549..064a00a3084a 100644
> > --- a/drivers/media/platform/sti/delta/delta-v4l2.c
> > +++ b/drivers/media/platform/sti/delta/delta-v4l2.c
> > @@ -954,10 +954,8 @@ static void delta_run_work(struct work_struct *work)
> >  	/* enable the hardware */
> >  	if (!dec->pm) {
> >  		ret = delta_get_sync(ctx);
> > -		if (ret) {
> > -			delta_put_autosuspend(ctx);
> > +		if (ret)
> >  			goto err;
> > -		}
> >  	}
> >  
> >  	/* decode this access unit */
> > @@ -1277,9 +1275,9 @@ int delta_get_sync(struct delta_ctx *ctx)
> >  	int ret = 0;  
> 
> Loose the init
> 
> >  
> >  	/* enable the hardware */
> > -	ret = pm_runtime_get_sync(delta->dev);
> > +	ret = pm_runtime_resume_and_get(delta->dev);
> >  	if (ret < 0) {
> > -		dev_err(delta->dev, "%s pm_runtime_get_sync failed (%d)\n",
> > +		dev_err(delta->dev, "%s pm_runtime_resume_and_get failed (%d)\n",
> >  			__func__, ret);
> >  		return ret;
> >  	}  
>