linux-kernel - Re: [PATCH] PCI: qcom: Fix the fixup of PCI_VENDOR_ID

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Message-ID: <f1e89dcc-4d5f-cc1f-8036-dcb062645cb0@mm-sol.com>
Date:   Mon, 4 Nov 2019 15:00:06 +0200
From:   Stanimir Varbanov <svarbanov@...sol.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <andrew.murray@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] PCI: qcom: Fix the fixup of PCI_VENDOR_ID_QCOM

Hi Bjorn,

Thanks for the fix!

On 11/2/19 2:24 AM, Bjorn Andersson wrote:
> There exists non-bridge PCIe devices with PCI_VENDOR_ID_QCOM, so limit
> the fixup to only affect the PCIe 2.0 (0x106) and PCIe 3.0 (0x107)
> bridges.

Are you sure that this will not break ops_1_0_0 (Qcom IP rev.: 1.0.0
Synopsys IP rev.: 4.11a) i.e. apq8084 ?

> 
> Cc: stable@...r.kernel.org
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 3 ++-
>  include/linux/pci_ids.h                | 2 ++
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 35f4980480bb..b91abf4d4905 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1441,7 +1441,8 @@ static void qcom_fixup_class(struct pci_dev *dev)
>  {
>  	dev->class = PCI_CLASS_BRIDGE_PCI << 8;
>  }
> -DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, PCI_ANY_ID, qcom_fixup_class);
> +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, PCIE_DEVICE_ID_QCOM_PCIE20, qcom_fixup_class);
> +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, PCIE_DEVICE_ID_QCOM_PCIE30, qcom_fixup_class);
>  
>  static struct platform_driver qcom_pcie_driver = {
>  	.probe = qcom_pcie_probe,
> diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
> index 21a572469a4e..3d0724ee4d2f 100644
> --- a/include/linux/pci_ids.h
> +++ b/include/linux/pci_ids.h
> @@ -2413,6 +2413,8 @@
>  #define PCI_VENDOR_ID_LENOVO		0x17aa
>  
>  #define PCI_VENDOR_ID_QCOM		0x17cb
> +#define PCIE_DEVICE_ID_QCOM_PCIE20	0x0106
> +#define PCIE_DEVICE_ID_QCOM_PCIE30	0x0107
>  
>  #define PCI_VENDOR_ID_CDNS		0x17cd
>  
> 

-- 
regards,
Stan