Re: [PATCH 6/9] remoteproc: qcom_q6v5_wcss: Use devm_rproc_alloc() helper

[Unnathi Chalicheemala <quic_uchalich@quicinc.com>]

On 1/23/2024 10:46 AM, Andrew Davis wrote:
> Use the device lifecycle managed allocation function. This helps prevent
> mistakes like freeing out of order in cleanup functions and forgetting to
> free on error paths.
> 
> Signed-off-by: Andrew Davis <afd@ti.com>
> ---
>  drivers/remoteproc/qcom_q6v5_wcss.c | 24 +++++++++---------------
>  1 file changed, 9 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
> index cff1fa07d1def..94f68c919ee62 100644
> --- a/drivers/remoteproc/qcom_q6v5_wcss.c
> +++ b/drivers/remoteproc/qcom_q6v5_wcss.c
> @@ -1011,8 +1011,8 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
>  	if (!desc)
>  		return -EINVAL;
>  
> -	rproc = rproc_alloc(&pdev->dev, pdev->name, desc->ops,
> -			    desc->firmware_name, sizeof(*wcss));
> +	rproc = devm_rproc_alloc(&pdev->dev, pdev->name, desc->ops,
> +				 desc->firmware_name, sizeof(*wcss));
>  	if (!rproc) {
>  		dev_err(&pdev->dev, "failed to allocate rproc\n");
>  		return -ENOMEM;
> @@ -1027,29 +1027,29 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
>  
>  	ret = q6v5_wcss_init_mmio(wcss, pdev);
>  	if (ret)
> -		goto free_rproc;
> +		return ret;
>  
>  	ret = q6v5_alloc_memory_region(wcss);
>  	if (ret)
> -		goto free_rproc;
> +		return ret;
>  
>  	if (wcss->version == WCSS_QCS404) {
>  		ret = q6v5_wcss_init_clock(wcss);
>  		if (ret)
> -			goto free_rproc;
> +			return ret;
>  
>  		ret = q6v5_wcss_init_regulator(wcss);
>  		if (ret)
> -			goto free_rproc;
> +			return ret;
>  	}
>  
>  	ret = q6v5_wcss_init_reset(wcss, desc);
>  	if (ret)
> -		goto free_rproc;
> +		return ret;
>  
>  	ret = qcom_q6v5_init(&wcss->q6v5, pdev, rproc, desc->crash_reason_smem, NULL, NULL);
>  	if (ret)
> -		goto free_rproc;
> +		return ret;
>  
>  	qcom_add_glink_subdev(rproc, &wcss->glink_subdev, "q6wcss");
>  	qcom_add_ssr_subdev(rproc, &wcss->ssr_subdev, "q6wcss");
> @@ -1061,16 +1061,11 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
>  
>  	ret = rproc_add(rproc);
>  	if (ret)
> -		goto free_rproc;
> +		return ret;
>  
>  	platform_set_drvdata(pdev, rproc);
>  
>  	return 0;
> -
> -free_rproc:
> -	rproc_free(rproc);
> -
> -	return ret;

This return statement should stay, right?

>  }
>  
>  static void q6v5_wcss_remove(struct platform_device *pdev)
> @@ -1080,7 +1075,6 @@ static void q6v5_wcss_remove(struct platform_device *pdev)
>  
>  	qcom_q6v5_deinit(&wcss->q6v5);
>  	rproc_del(rproc);
> -	rproc_free(rproc);
>  }
>  
>  static const struct wcss_data wcss_ipq8074_res_init = {