linux-kernel - Re: [PATCH 1/5] vfio-pci: Allow PCI IDs to be specified as module options

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Message-ID: <1425507522.5200.311.camel@redhat.com>
Date:	Wed, 04 Mar 2015 15:18:42 -0700
From:	Alex Williamson <alex.williamson@...hat.com>
To:	Bandan Das <bsd@...hat.com>
Cc:	kvm@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] vfio-pci: Allow PCI IDs to be specified as module
 options

On Wed, 2015-03-04 at 15:49 -0500, Bandan Das wrote:
> Hi Alex,
> 
> Alex Williamson <alex.williamson@...hat.com> writes:
> ...
> > +		if (fields < 2) {
> > +			pr_warn("vfio-pci: invalid id string \"%s\"\n", id);
> > +			continue;
> > +		}
> > +
> > +		pr_info("vfio-pci: add %04X:%04X sub=%04X:%04X cls=%08X/%08X\n",
> > +			vendor, device, subvendor, subdevice,
> > +			class, class_mask);
> > +
> > +		rc = pci_add_dynid(&vfio_pci_driver, vendor, device,
> > +				   subvendor, subdevice, class, class_mask, 0);
> > +		if (rc)
> > +			pr_warn("vfio-pci: failed to add dynamic id (%d)\n",
> > +				rc);
> Just a minor observation - maybe we should print out the
> vendor/device/subvendor/subdevice as part of the failure message too. The info
> message could potentially get lost in a system with high syslog traffic.

Thanks for the comment.  I don't think we want to duplicate the pr_info
above it, so are you thinking something like this?

                if (fields < 2) {
                        pr_warn("vfio-pci: invalid id string \"%s\"\n", id);
                        continue;
                }

                rc = pci_add_dynid(&vfio_pci_driver, vendor, device,
                                   subvendor, subdevice, class, class_mask, 0);
                if (rc)
                        pr_warn("vfio-pci: failed to add dynamic id: %04X:%04X sub=%04X:%04X cls=%08X/%08X (%d)\n",
                                vendor, device, subvendor, subdevice,
                                class, class_mask, rc);
                else
                        pr_info("vfio-pci: add %04X:%04X sub=%04X:%04X cls=%08X/%08X\n",
                                vendor, device, subvendor, subdevice,
                                class, class_mask);
        }


> > +	}
> > +}
> > +
> >  static int __init vfio_pci_init(void)
> >  {
> >  	int ret;
> > @@ -1053,6 +1097,8 @@ static int __init vfio_pci_init(void)
> >  	if (ret)
> >  		goto out_driver;
> >  
> > +	vfio_pci_fill_ids();
> > +
> >  	return 0;
> >  
> >  out_driver:
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe kvm" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html



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