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

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Message-ID: <20191106202351.GE36595@minitux>
Date:   Wed, 6 Nov 2019 12:23:51 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Stanimir Varbanov <svarbanov@...sol.com>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <andrew.murray@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        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

On Mon 04 Nov 05:00 PST 2019, Stanimir Varbanov wrote:

> 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 ?
> 

I am not, I've only tested this on db820c and db845c. Unfortunately I'm
unable to find a branch with the necessary dts snippets to test it. Do
you perhaps have a branch somewhere?

Regards,
Bjorn

> > 
> > 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