linux-kernel - Re: [PATCH v3 11/11] misc: pci_endpoint_test: Add LS1088a in pci_device

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Message-ID: <20190912125939.GE9720@e119886-lin.cambridge.arm.com>
Date:   Thu, 12 Sep 2019 13:59:40 +0100
From:   Andrew Murray <andrew.murray@....com>
To:     Xiaowei Bao <xiaowei.bao@....com>, helgaas@...nel.org
Cc:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Leo Li <leoyang.li@....com>, "kishon@...com" <kishon@...com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
        "jingoohan1@...il.com" <jingoohan1@...il.com>,
        "gustavo.pimentel@...opsys.com" <gustavo.pimentel@...opsys.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "Z.q. Hou" <zhiqiang.hou@....com>
Subject: Re: [PATCH v3 11/11] misc: pci_endpoint_test: Add LS1088a in
 pci_device_id table

On Tue, Sep 03, 2019 at 01:52:30AM +0000, Xiaowei Bao wrote:
> 
> 
> > -----Original Message-----
> > From: Andrew Murray <andrew.murray@....com>
> > Sent: 2019年9月2日 20:55
> > To: Xiaowei Bao <xiaowei.bao@....com>
> > Cc: robh+dt@...nel.org; mark.rutland@....com; shawnguo@...nel.org; Leo
> > Li <leoyang.li@....com>; kishon@...com; lorenzo.pieralisi@....com; M.h.
> > Lian <minghuan.lian@....com>; Mingkai Hu <mingkai.hu@....com>; Roy
> > Zang <roy.zang@....com>; jingoohan1@...il.com;
> > gustavo.pimentel@...opsys.com; linux-pci@...r.kernel.org;
> > devicetree@...r.kernel.org; linux-kernel@...r.kernel.org;
> > linux-arm-kernel@...ts.infradead.org; linuxppc-dev@...ts.ozlabs.org;
> > arnd@...db.de; gregkh@...uxfoundation.org; Z.q. Hou
> > <zhiqiang.hou@....com>
> > Subject: Re: [PATCH v3 11/11] misc: pci_endpoint_test: Add LS1088a in
> > pci_device_id table
> > 
> > On Mon, Sep 02, 2019 at 11:17:16AM +0800, Xiaowei Bao wrote:
> > > Add LS1088a in pci_device_id table so that pci-epf-test can be used
> > > for testing PCIe EP in LS1088a.
> > >
> > > Signed-off-by: Xiaowei Bao <xiaowei.bao@....com>
> > > ---
> > > v2:
> > >  - No change.
> > > v3:
> > >  - No change.
> > >
> > >  drivers/misc/pci_endpoint_test.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/drivers/misc/pci_endpoint_test.c
> > > b/drivers/misc/pci_endpoint_test.c
> > > index 6e208a0..d531951 100644
> > > --- a/drivers/misc/pci_endpoint_test.c
> > > +++ b/drivers/misc/pci_endpoint_test.c
> > > @@ -793,6 +793,7 @@ static const struct pci_device_id
> > pci_endpoint_test_tbl[] = {
> > >  	{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x) },
> > >  	{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA72x) },
> > >  	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, 0x81c0) },
> > > +	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, 0x80c0) },
> > 
> > The Freescale PCI devices are the only devices in this table that don't have a
> > define for their device ID. I think a define should be created for both of the
> > device IDs above.
> 
> OK, but I only define in this file, I am not sure this can define in include/linux/pci_ids.h
> file 

This file seems a little inconsistent...

 - Two of the TI device IDs are defined in pci_ids.h and only used in pci_endpoint_test.c
 - One of the TI device IDs are defined in pci_endpoint_test.c and only used there
 - The Freescale device ID is hardcoded and only used in pci_endpoint_test.c

The header in pci_ids.h has a comment suggestion definitions are only added where used
in multiple files - yet I don't think this holds true.

Bjorn - do you have a suggestion?

Thanks,

Andrew Murray

> 
> Thanks 
> Xiaowei
> 
> > 
> > Thanks,
> > 
> > Andrew Murray
> > 
> > >  	{ PCI_DEVICE_DATA(SYNOPSYS, EDDA, NULL) },
> > >  	{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_AM654),
> > >  	  .driver_data = (kernel_ulong_t)&am654_data
> > > --
> > > 2.9.5
> > >