linux-kernel - Re: [PATCH] vfio: Extended capability fixes

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Message-Id: <201011021519.35300.pugs@cisco.com>
Date:	Tue, 2 Nov 2010 15:19:34 -0700
From:	Tom Lyon <pugs@...co.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Alex Williamson <alex.williamson@...hat.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	kvm@...r.kernel.org
Subject: Re: [PATCH] vfio: Extended capability fixes

On Tuesday, November 02, 2010 12:11:08 pm Michael S. Tsirkin wrote:
> On Mon, Nov 01, 2010 at 11:08:35PM -0600, Alex Williamson wrote:
> > - Virtual channel position gets truncated as a u8
> > 
> >  - Print the ecap that's unknown, not the last cap we saw
> >  - Print actual config offset, which provides enough info to make
> >  
> >    some sense of the error.
> > 
> > Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
> > ---
> > 
> >  drivers/vfio/vfio_pci_config.c |    8 ++++----
> >  1 files changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/vfio/vfio_pci_config.c
> > b/drivers/vfio/vfio_pci_config.c index 8af995d..8304316 100644
> > --- a/drivers/vfio/vfio_pci_config.c
> > +++ b/drivers/vfio/vfio_pci_config.c
> > @@ -410,7 +410,7 @@ static int vfio_msi_cap_len(struct vfio_dev *vdev, u8
> > pos)
> > 
> >   * Determine extended capability length for VC (2 & 9) and
> >   * MFVC capabilities
> >   */
> > 
> > -static int vfio_vc_cap_len(struct vfio_dev *vdev, u8 pos)
> > +static int vfio_vc_cap_len(struct vfio_dev *vdev, u16 pos)
> > 
> >  {
> >  
> >  	struct pci_dev *pdev = vdev->pdev;
> >  	u32 dw;
> > 
> > @@ -580,7 +580,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
> > 
> >  				printk(KERN_WARNING
> >  				
> >  					"%s: pci config conflict at %x, "
> >  					"caps %x %x\n",
> > 
> > -					__func__, i, map[pos+i], cap);
> > +					__func__, pos+i, map[pos+i], cap);
> > 
> >  			map[pos+i] = cap;
> >  		
> >  		}
> >  		ret = pci_read_config_byte(pdev, pos + PCI_CAP_LIST_NEXT, &pos);
> > 
> > @@ -683,7 +683,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
> > 
> >  		if (len == 0 || len == 0xFF) {
> >  		
> >  			printk(KERN_WARNING
> >  			
> >  				"%s: unknown length for pci ext cap %x\n",
> > 
> > -				__func__, cap);
> > +				__func__, ecap);
> > 
> >  			len = PCI_CAP_SIZEOF;
> >  		
> >  		}
> >  		for (i = 0; i < len; i++) {
> > 
> > @@ -691,7 +691,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
> > 
> >  				printk(KERN_WARNING
> >  				
> >  					"%s: pci config conflict at %x, "
> >  					"caps %x %x\n",
> > 
> > -					__func__, i, map[epos+i], ecap);
> > +					__func__, epos+i, map[epos+i], ecap);
> > 
> >  			map[epos+i] = ecap;
> 
> Not related to this patch, but I am surprised checkpatch does not
> complain about lack of spaces around + here and elsewhere.
> Or does it?
It did not complain.

> 
> >  		}
> > 
> > --
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