[PATCH] vfio/pds: Using pci_physfn() to fix a compilation issue

[PATCH] vfio/pds: Using pci_physfn() to fix a compilation issue

[oushixiong]

From: Shixiong Ou <oushixiong@kylinos.cn>

If PCI_ATS isn't set, then pdev->physfn is not defined.
it causes a compilation issue:

../drivers/vfio/pci/pds/vfio_dev.c:165:30: error: ‘struct pci_dev’ has no member named ‘physfn’; did you mean ‘is_physfn’?
  165 |   __func__, pci_dev_id(pdev->physfn), pci_id, vf_id,
      |                              ^~~~~~

So using pci_physfn() rather than using pdev->physfn directly.

Signed-off-by: Shixiong Ou <oushixiong@kylinos.cn>
---
 drivers/vfio/pci/pds/vfio_dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/pds/vfio_dev.c b/drivers/vfio/pci/pds/vfio_dev.c
index b46174f5eb09..649b18ee394b 100644
--- a/drivers/vfio/pci/pds/vfio_dev.c
+++ b/drivers/vfio/pci/pds/vfio_dev.c
@@ -162,7 +162,7 @@ static int pds_vfio_init_device(struct vfio_device *vdev)
 	pci_id = PCI_DEVID(pdev->bus->number, pdev->devfn);
 	dev_dbg(&pdev->dev,
 		"%s: PF %#04x VF %#04x vf_id %d domain %d pds_vfio %p\n",
-		__func__, pci_dev_id(pdev->physfn), pci_id, vf_id,
+		__func__, pci_dev_id(pci_physfn(pdev)), pci_id, vf_id,
 		pci_domain_nr(pdev->bus), pds_vfio);
 
 	return 0;
-- 
2.25.1

RE: [PATCH] vfio/pds: Using pci_physfn() to fix a compilation issue

[Tian, Kevin]

> From: oushixiong <oushixiong@kylinos.cn>
> Sent: Monday, September 11, 2023 4:08 PM
> 
> From: Shixiong Ou <oushixiong@kylinos.cn>
> 
> If PCI_ATS isn't set, then pdev->physfn is not defined.
> it causes a compilation issue:
> 
> ../drivers/vfio/pci/pds/vfio_dev.c:165:30: error: ‘struct pci_dev’ has no
> member named ‘physfn’; did you mean ‘is_physfn’?
>   165 |   __func__, pci_dev_id(pdev->physfn), pci_id, vf_id,
>       |                              ^~~~~~
> 
> So using pci_physfn() rather than using pdev->physfn directly.
> 
> Signed-off-by: Shixiong Ou <oushixiong@kylinos.cn>

Reviewed-by: Kevin Tian <kevin.tian@intel.com>

Re: [PATCH] vfio/pds: Using pci_physfn() to fix a compilation issue

[Jason Gunthorpe]

On Mon, Sep 11, 2023 at 08:25:18AM +0000, Tian, Kevin wrote:
> > From: oushixiong <oushixiong@kylinos.cn>
> > Sent: Monday, September 11, 2023 4:08 PM
> > 
> > From: Shixiong Ou <oushixiong@kylinos.cn>
> > 
> > If PCI_ATS isn't set, then pdev->physfn is not defined.
> > it causes a compilation issue:
> > 
> > ../drivers/vfio/pci/pds/vfio_dev.c:165:30: error: ‘struct pci_dev’ has no
> > member named ‘physfn’; did you mean ‘is_physfn’?
> >   165 |   __func__, pci_dev_id(pdev->physfn), pci_id, vf_id,
> >       |                              ^~~~~~
> > 
> > So using pci_physfn() rather than using pdev->physfn directly.
> > 
> > Signed-off-by: Shixiong Ou <oushixiong@kylinos.cn>
> 
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>

Yes, we should do both patches

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Jason

Re: [PATCH] vfio/pds: Using pci_physfn() to fix a compilation issue

[Alex Williamson]

On Mon, 11 Sep 2023 09:28:02 -0300
Jason Gunthorpe <jgg@ziepe.ca> wrote:

> On Mon, Sep 11, 2023 at 08:25:18AM +0000, Tian, Kevin wrote:
> > > From: oushixiong <oushixiong@kylinos.cn>
> > > Sent: Monday, September 11, 2023 4:08 PM
> > > 
> > > From: Shixiong Ou <oushixiong@kylinos.cn>
> > > 
> > > If PCI_ATS isn't set, then pdev->physfn is not defined.
> > > it causes a compilation issue:
> > > 
> > > ../drivers/vfio/pci/pds/vfio_dev.c:165:30: error: ‘struct pci_dev’ has no
> > > member named ‘physfn’; did you mean ‘is_physfn’?
> > >   165 |   __func__, pci_dev_id(pdev->physfn), pci_id, vf_id,
> > >       |                              ^~~~~~
> > > 
> > > So using pci_physfn() rather than using pdev->physfn directly.
> > > 
> > > Signed-off-by: Shixiong Ou <oushixiong@kylinos.cn>  
> > 
> > Reviewed-by: Kevin Tian <kevin.tian@intel.com>  
> 
> Yes, we should do both patches

Sure, but it's sloppy to put both in with the same commit log.  Should
we change this one to something like:

    vfio/pds: Use proper PF device access helper

    The pci_physfn() helper exists to support cases where the physfn
    field may not be compiled into the pci_dev structure.  We've
    declared this driver dependent on PCI_IOV to avoid this problem,
    but regardless we should follow the precedent not to access this
    field directly.

Thanks,
Alex