linux-kernel - Re: [PATCH 07/23] interconnect: qcom: rpm: fix probe PM domain error handling

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Message-ID: <641d04a3-9236-fe76-a20f-11466a01460e@wanadoo.fr>
Date:   Sat, 11 Mar 2023 19:17:50 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     johan+linaro@...nel.org
Cc:     a.swigon@...sung.com, agross@...nel.org, alim.akhtar@...sung.com,
        andersson@...nel.org, djakov@...nel.org, festevam@...il.com,
        jonathanh@...dia.com, kernel@...gutronix.de,
        konrad.dybcio@...aro.org, krzysztof.kozlowski@...aro.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-imx@....com,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org, linux-tegra@...r.kernel.org,
        s.hauer@...gutronix.de, s.nawrocki@...sung.com,
        shawnguo@...nel.org, stable@...r.kernel.org,
        thierry.reding@...il.com, y.oudjana@...tonmail.com
Subject: Re: [PATCH 07/23] interconnect: qcom: rpm: fix probe PM domain error
 handling

Le 01/02/2023 à 11:15, Johan Hovold a écrit :
> Make sure to disable clocks also in case attaching the power domain
> fails.
> 
> Fixes: 7de109c0abe9 ("interconnect: icc-rpm: Add support for bus power domain")
> Cc: stable-u79uwXL29TY76Z2rM5mHXA@...lic.gmane.org      # 5.17
> Cc: Yassine Oudjana <y.oudjana-g/b1ySJe57IN+BqQ9rBEUg@...lic.gmane.org>
> Signed-off-by: Johan Hovold <johan+linaro-DgEjT+Ai2ygdnm+yROfE0A@...lic.gmane.org>
> ---
>   drivers/interconnect/qcom/icc-rpm.c | 9 ++++-----
>   1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
> index 91778cfcbc65..da595059cafd 100644
> --- a/drivers/interconnect/qcom/icc-rpm.c
> +++ b/drivers/interconnect/qcom/icc-rpm.c
> @@ -498,8 +498,7 @@ int qnoc_probe(struct platform_device *pdev)
>   
>   	if (desc->has_bus_pd) {
>   		ret = dev_pm_domain_attach(dev, true);
> -		if (ret)
> -			return ret;
> +		goto err_disable_clks;

Hi,
this change looks strange because we now skip the rest of the function.

Is it really intended?


Also, should dev_pm_domain_detach() be called somewhere in the error 
handling path and remove function ?

CJ


>   	}
>   
>   	provider = &qp->provider;
> @@ -514,8 +513,7 @@ int qnoc_probe(struct platform_device *pdev)
>   	ret = icc_provider_add(provider);
>   	if (ret) {
>   		dev_err(dev, "error adding interconnect provider: %d\n", ret);
> -		clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
> -		return ret;
> +		goto err_disable_clks;
>   	}
>   
>   	for (i = 0; i < num_nodes; i++) {
> @@ -550,8 +548,9 @@ int qnoc_probe(struct platform_device *pdev)
>   	return 0;
>   err:
>   	icc_nodes_remove(provider);
> -	clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
>   	icc_provider_del(provider);
> +err_disable_clks:
> +	clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
>   
>   	return ret;
>   }