linux-kernel - Re: [PATCH v2 1/2] PCI: qcom: Fix runtime PM imbalance on probe errors

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Date:   Wed, 27 Apr 2022 13:24:41 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2 1/2] PCI: qcom: Fix runtime PM imbalance on probe
 errors

On Fri, Apr 01, 2022 at 03:38:53PM +0200, Johan Hovold wrote:
> Drop the leftover pm_runtime_disable() calls from the late probe error
> paths that would, for example, prevent runtime PM from being reenabled
> after a probe deferral.
> 
> Fixes: 6e5da6f7d824 ("PCI: qcom: Fix error handling in runtime PM support")
> Cc: stable@...r.kernel.org      # 4.20
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 20a0e6533a1c..0b0bd71f1bd2 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1616,17 +1616,14 @@ static int qcom_pcie_probe(struct platform_device *pdev)
>  	pp->ops = &qcom_pcie_dw_ops;
>  
>  	ret = phy_init(pcie->phy);
> -	if (ret) {
> -		pm_runtime_disable(&pdev->dev);
> +	if (ret)
>  		goto err_pm_runtime_put;
> -	}
>  
>  	platform_set_drvdata(pdev, pcie);
>  
>  	ret = dw_pcie_host_init(pp);
>  	if (ret) {
>  		dev_err(dev, "cannot initialize host\n");
> -		pm_runtime_disable(&pdev->dev);
>  		goto err_pm_runtime_put;
>  	}
>  
> -- 
> 2.35.1
>