linux-kernel - RE: [PATCH] PCI: set correct value for iov device before device

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Date:	Thu, 30 May 2013 06:26:55 +0000
From:	"Hao, Xudong" <xudong.hao@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>,
	Yijing Wang <wangyijing@...wei.com>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] PCI: set correct value for iov device before device

Okay, I saw patch in PCI tree two days ago by Jiang Liu.

Thanks,
-Xudong


> -----Original Message-----
> From: yhlu.kernel@...il.com [mailto:yhlu.kernel@...il.com] On Behalf Of
> Yinghai Lu
> Sent: Thursday, May 30, 2013 2:05 PM
> To: Hao, Xudong
> Cc: Bjorn Helgaas; linux-pci@...r.kernel.org; Linux Kernel Mailing List
> Subject: Re: [PATCH] PCI: set correct value for iov device before device
> 
> On Wed, May 29, 2013 at 10:45 PM, Xudong Hao <xudong.hao@...el.com>
> wrote:
> > Since device registering is put into pci_device_add(), it must set value of
> > Virtual Function device's member before the pci_dev is put to device tree. Or
> > some relevant subsystem of driver model such as xen will report a incorrect
> > IOV device to Xen hypervior.
> >
> > Signed-off-by: Xudong Hao <xudong.hao@...el.com>
> > ---
> >  drivers/pci/iov.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> > index c93071d..43d3de9 100644
> > --- a/drivers/pci/iov.c
> > +++ b/drivers/pci/iov.c
> > @@ -110,12 +110,12 @@ static int virtfn_add(struct pci_dev *dev, int id, int
> reset)
> >         if (reset)
> >                 __pci_reset_function(virtfn);
> >
> > -       pci_device_add(virtfn, virtfn->bus);
> > -       mutex_unlock(&iov->dev->sriov->lock);
> > -
> >         virtfn->physfn = pci_dev_get(dev);
> >         virtfn->is_virtfn = 1;
> >
> > +       pci_device_add(virtfn, virtfn->bus);
> > +       mutex_unlock(&iov->dev->sriov->lock);
> > +
> >         rc = pci_bus_add_device(virtfn);
> >         sprintf(buf, "virtfn%u", id);
> >         rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
> 
> I have similar patch at
> https://patchwork.kernel.org/patch/2562551/
>    [5/7] PCI, ACPI: Don't glue ACPI dev with pci VFs
> 
> and Jiang has another one
> https://patchwork.kernel.org/patch/2613481/
>    [v3,part1,10/10] PCI, IOV: hide remove and rescan sysfs interfaces
> for SR-IOV virtual functions
> 
> Thanks
> 
> Yinghai
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