linux-kernel - Re: [PATCH v3 1/2] PCI: qcom: Fix host-init error handling

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Date:   Mon, 2 Jan 2023 23:13:13 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Stanimir Varbanov <svarbanov@...sol.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Manivannan Sadhasivam <mani@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] PCI: qcom: Fix host-init error handling

On Mon, Oct 17, 2022 at 01:47:04PM +0200, Johan Hovold wrote:
> Implement the new host_deinit() callback so that the PHY is powered off
> and regulators and clocks are disabled also on late host-init errors.
> 
> Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>

Thanks,
Mani

> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 0c13f976626f..417be4d225ed 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1534,8 +1534,19 @@ static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
>  	return ret;
>  }
>  
> +static void qcom_pcie_host_deinit(struct dw_pcie_rp *pp)
> +{
> +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> +	struct qcom_pcie *pcie = to_qcom_pcie(pci);
> +
> +	qcom_ep_reset_assert(pcie);
> +	phy_power_off(pcie->phy);
> +	pcie->cfg->ops->deinit(pcie);
> +}
> +
>  static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
> -	.host_init = qcom_pcie_host_init,
> +	.host_init	= qcom_pcie_host_init,
> +	.host_deinit	= qcom_pcie_host_deinit,
>  };
>  
>  /* Qcom IP rev.: 2.1.0	Synopsys IP rev.: 4.01a */
> -- 
> 2.37.3
> 

-- 
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