linux-kernel - Re: [PATCH] vfio/pds: Use proper PF device access helper

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Date:   Fri, 15 Sep 2023 12:58:58 -0600
From:   Alex Williamson <alex.williamson@...hat.com>
To:     oushixiong <oushixiong@...inos.cn>
Cc:     Jason Gunthorpe <jgg@...pe.ca>, Yishai Hadas <yishaih@...dia.com>,
        Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Brett Creeley <brett.creeley@....com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vfio/pds: Use proper PF device access helper

On Thu, 14 Sep 2023 10:13:32 +0800
oushixiong <oushixiong@...inos.cn> wrote:

> From: Shixiong Ou <oushixiong@...inos.cn>
> 
> 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.
> 
> Signed-off-by: Shixiong Ou <oushixiong@...inos.cn>
> ---
> 
> This patch changes the subject line and commit log, and the previous 
> patch's links is:
> 	https://patchwork.kernel.org/project/kvm/patch/20230911080828.635184-1-oushixiong@kylinos.cn/

Kevin & Jason,

I assume your R-b's apply to this version as well.  Thanks,

Alex

> 
>  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;