linux-kernel - Re: [PATCH v4 67/79] media: venus: vdec: use pm_runtime_resume_and

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Date:   Fri, 30 Apr 2021 18:53:52 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
CC:     <linuxarm@...wei.com>, <mauro.chehab@...wei.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-media@...r.kernel.org>
Subject: Re: [PATCH v4 67/79] media: venus: vdec: use
 pm_runtime_resume_and_get()

On Wed, 28 Apr 2021 16:52:28 +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>
> ---
>  drivers/media/platform/qcom/venus/vdec.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
> index ddb7cd39424e..347e533ea673 100644
> --- a/drivers/media/platform/qcom/venus/vdec.c
> +++ b/drivers/media/platform/qcom/venus/vdec.c
> @@ -568,7 +568,7 @@ static int vdec_pm_get(struct venus_inst *inst)
>  	int ret;
>  
>  	mutex_lock(&core->pm_lock);
> -	ret = pm_runtime_get_sync(dev);
> +	ret = pm_runtime_resume_and_get(dev);
>  	mutex_unlock(&core->pm_lock);
>  
>  	return ret < 0 ? ret : 0;
Don't need this dance any more due to " Return 0 if the runtime PM usage counter of @dev has been
 * incremented or a negative error code otherwise."
return ret;

> @@ -601,7 +601,7 @@ static int vdec_pm_get_put(struct venus_inst *inst)
>  	mutex_lock(&core->pm_lock);
>  
>  	if (pm_runtime_suspended(dev)) {
> -		ret = pm_runtime_get_sync(dev);
> +		ret = pm_runtime_resume_and_get(dev);
>  		if (ret < 0)
>  			goto error;
>