linux-kernel - Re: [PATCH] remoteproc: imx_dsp_rproc: use modern pm

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Message-ID: <df34031f-18a4-3d1b-120f-3e4ec9015934@quicinc.com>
Date:   Fri, 21 Apr 2023 12:31:12 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     Arnd Bergmann <arnd@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>
CC:     Arnd Bergmann <arnd@...db.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Shengjiu Wang <shengjiu.wang@....com>,
        Iuliana Prodan <iuliana.prodan@....com>,
        Daniel Baluta <daniel.baluta@....com>,
        Markus Elfring <Markus.Elfring@....de>,
        <linux-remoteproc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] remoteproc: imx_dsp_rproc: use modern pm_ops



On 4/21/2023 3:06 AM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Without CONFIG_PM, the driver warns about unused functions:
> 
> drivers/remoteproc/imx_dsp_rproc.c:1210:12: error: 'imx_dsp_runtime_suspend' defined but not used [-Werror=unused-function]
>   1210 | static int imx_dsp_runtime_suspend(struct device *dev)
>        |            ^~~~~~~~~~~~~~~~~~~~~~~
> drivers/remoteproc/imx_dsp_rproc.c:1178:12: error: 'imx_dsp_runtime_resume' defined but not used [-Werror=unused-function]
>   1178 | static int imx_dsp_runtime_resume(struct device *dev)
>        |            ^~~~~~~~~~~~~~~~~~~~~~
> 
> Change the old SET_SYSTEM_SLEEP_PM_OPS()/SET_RUNTIME_PM_OPS()
> helpers to their modern replacements that avoid the warning,
> and remove the now unnecessary __maybe_unused annotations
> on the other PM helper functions.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/remoteproc/imx_dsp_rproc.c | 11 +++++------
>   1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> index cab06dbf37fb..2d75dea43f20 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -1243,7 +1243,7 @@ static void imx_dsp_load_firmware(const struct firmware *fw, void *context)
>   	release_firmware(fw);
>   }
>   
> -static __maybe_unused int imx_dsp_suspend(struct device *dev)
> +static int imx_dsp_suspend(struct device *dev)
>   {
>   	struct rproc *rproc = dev_get_drvdata(dev);
>   	struct imx_dsp_rproc *priv = rproc->priv;
> @@ -1278,7 +1278,7 @@ static __maybe_unused int imx_dsp_suspend(struct device *dev)
>   	return pm_runtime_force_suspend(dev);
>   }
>   
> -static __maybe_unused int imx_dsp_resume(struct device *dev)
> +static int imx_dsp_resume(struct device *dev)
>   {
>   	struct rproc *rproc = dev_get_drvdata(dev);
>   	int ret = 0;
> @@ -1312,9 +1312,8 @@ static __maybe_unused int imx_dsp_resume(struct device *dev)
>   }
>   
>   static const struct dev_pm_ops imx_dsp_rproc_pm_ops = {
> -	SET_SYSTEM_SLEEP_PM_OPS(imx_dsp_suspend, imx_dsp_resume)
> -	SET_RUNTIME_PM_OPS(imx_dsp_runtime_suspend,
> -			   imx_dsp_runtime_resume, NULL)
> +	SYSTEM_SLEEP_PM_OPS(imx_dsp_suspend, imx_dsp_resume)
> +	RUNTIME_PM_OPS(imx_dsp_runtime_suspend, imx_dsp_runtime_resume, NULL)
>   };
>   
>   static const struct of_device_id imx_dsp_rproc_of_match[] = {
> @@ -1332,7 +1331,7 @@ static struct platform_driver imx_dsp_rproc_driver = {
>   	.driver = {
>   		.name = "imx-dsp-rproc",
>   		.of_match_table = imx_dsp_rproc_of_match,
> -		.pm = &imx_dsp_rproc_pm_ops,
> +		.pm = pm_ptr(&imx_dsp_rproc_pm_ops),

LGTM.
Reviewed-by: Mukesh Ojha <quic_mojha@...cinc.com>

-Mukesh
>   	},
>   };
>   module_platform_driver(imx_dsp_rproc_driver);