linux-kernel - Re: [PATCH v3 01/11] remoteproc: imx_dsp_rproc: simplify power domain attach and error handling

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Message-ID: <aRyhWF5Wh5GxXsCg@p14s>
Date: Tue, 18 Nov 2025 09:39:52 -0700
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: Bjorn Andersson <andersson@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	linux-remoteproc@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Peng Fan <peng.fan@....com>, Frank Li <Frank.Li@....com>,
	Daniel Baluta <daniel.baluta@....com>,
	Shengjiu Wang <shengjiu.wang@....com>
Subject: Re: [PATCH v3 01/11] remoteproc: imx_dsp_rproc: simplify power
 domain attach and error handling

On Tue, Nov 11, 2025 at 09:41:12AM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Refactor imx_dsp_attach_pm_domains() to use devm_pm_domain_attach_list()
> directly, removing manual detach logic and simplifying resource management.
> 
> Also replace verbose error handling in imx_dsp_rproc_probe() with
> dev_err_probe() for cleaner and more consistent error reporting.
> 
> No functional changes.
> 
> Reviewed-by: Frank Li <Frank.Li@....com>
> Reviewed-by: Daniel Baluta <daniel.baluta@....com>
> Reviewed-by: Shengjiu Wang <shengjiu.wang@....com>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/remoteproc/imx_dsp_rproc.c | 29 ++++++++---------------------
>  1 file changed, 8 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> index 6e78a01755c7bdc28cd93f00fe6f74affc3d96b0..c466363debbebe8f91b908b3bffaa32e9bf8b9a6 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -1062,14 +1062,12 @@ static const struct rproc_ops imx_dsp_rproc_ops = {
>  static int imx_dsp_attach_pm_domains(struct imx_dsp_rproc *priv)
>  {
>  	struct device *dev = priv->rproc->dev.parent;
> -	int ret;
>  
>  	/* A single PM domain is already attached. */
>  	if (dev->pm_domain)
>  		return 0;
>  
> -	ret = dev_pm_domain_attach_list(dev, NULL, &priv->pd_list);
> -	return ret < 0 ? ret : 0;
> +	return devm_pm_domain_attach_list(dev, NULL, &priv->pd_list);
>  }
>  
>  /**
> @@ -1186,35 +1184,25 @@ static int imx_dsp_rproc_probe(struct platform_device *pdev)
>  
>  	/* There are multiple power domains required by DSP on some platform */
>  	ret = imx_dsp_attach_pm_domains(priv);
> -	if (ret) {
> -		dev_err(dev, "failed on imx_dsp_attach_pm_domains\n");
> -		return ret;
> -	}
> +	if (ret < 0)
> +		return dev_err_probe(dev, ret, "failed on imx_dsp_attach_pm_domains\n");
> +
>  	/* Get clocks */
>  	ret = imx_dsp_rproc_clk_get(priv);
> -	if (ret) {
> -		dev_err(dev, "failed on imx_dsp_rproc_clk_get\n");
> -		goto err_detach_domains;
> -	}
> +	if (ret)
> +		return dev_err_probe(dev, ret, "failed on imx_dsp_rproc_clk_get\n");
>  
>  	init_completion(&priv->pm_comp);
>  	rproc->auto_boot = false;
>  	ret = rproc_add(rproc);
> -	if (ret) {
> -		dev_err(dev, "rproc_add failed\n");
> -		goto err_detach_domains;
> -	}
> +	if (ret)
> +		return dev_err_probe(dev, ret, "rproc_add failed\n");
>  
>  	rproc_coredump_set_elf_info(rproc, ELFCLASS32, EM_XTENSA);
>  
>  	pm_runtime_enable(dev);
>  
>  	return 0;
> -
> -err_detach_domains:
> -	dev_pm_domain_detach_list(priv->pd_list);
> -
> -	return ret;
>  }
>  
>  static void imx_dsp_rproc_remove(struct platform_device *pdev)
> @@ -1224,7 +1212,6 @@ static void imx_dsp_rproc_remove(struct platform_device *pdev)
>  
>  	pm_runtime_disable(&pdev->dev);
>  	rproc_del(rproc);
> -	dev_pm_domain_detach_list(priv->pd_list);

This patch is giving me a compilation warning.

>  }
>  
>  /* pm runtime functions */
> 
> -- 
> 2.37.1
>