linux-kernel - Re: [PATCH v2 2/2] PCI: qcom: Fix unbalanced PHY init on probe errors

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Date:   Wed, 27 Apr 2022 13:25:16 +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 2/2] PCI: qcom: Fix unbalanced PHY init on probe errors

On Fri, Apr 01, 2022 at 03:38:54PM +0200, Johan Hovold wrote:
> Make sure to undo the PHY initialisation (e.g. balance runtime PM) in
> case host initialisation fails during probe.
> 
> Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
> Cc: stable@...r.kernel.org      # 4.5
> Cc: Stanimir Varbanov <svarbanov@...sol.com>
> 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 | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 0b0bd71f1bd2..df47986bda29 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1624,11 +1624,13 @@ static int qcom_pcie_probe(struct platform_device *pdev)
>  	ret = dw_pcie_host_init(pp);
>  	if (ret) {
>  		dev_err(dev, "cannot initialize host\n");
> -		goto err_pm_runtime_put;
> +		goto err_phy_exit;
>  	}
>  
>  	return 0;
>  
> +err_phy_exit:
> +	phy_exit(pcie->phy);
>  err_pm_runtime_put:
>  	pm_runtime_put(dev);
>  	pm_runtime_disable(dev);
> -- 
> 2.35.1
>